- Yale New Haven Transplantation Center - DermatologyYale Physicians Building800 Howard Avenue, Fl 4th floorNew Haven, CT 06519
- Yale DermatopathologyLaboratory for Medicine and Pediatrics (LMP)15 York Street, Fl 5th floor Ste Dermatopathology Rm LMP 5031New Haven, CT 06510
Christine Ko, MD
Biography
Dermatologist Christine J. Ko, MD, prides herself on being able to provide patients with an accurate diagnosis so they can have the most effective treatment possible. Just as important to her are the relationships she forms with her patients, whether they are adults, adolescents or children. “I try to treat patients as I would a family member with the same condition,” she says.
In addition to being a clinical dermatologist, Dr. Ko is also a skin pathologist, or dermatopathologist. This additional training helps her to better evaluate skin biopsies for her patients.
Dermatopathology is a key part of dermatology, says Dr. Ko. “The correct diagnosis often rests on a careful correlation between clinical and microscopic findings, something that is especially important for complex cases,” she says. “We can arrive at this diagnosis by reviewing prior biopsies, taking new biopsies, and consulting our team of dermatologists and dermatopathologists at our weekly Grand Rounds meetings.”
A professor of dermatology and dermatopathology at Yale School of Medicine, Dr. Ko is particularly interested in skin cancer. “One of my passions is to better understand the mechanisms of squamous cell carcinogenesis,” says Dr. Ko. This is one of the most common types of skin cancer today and is highly treatable if detected early, she says.
Titles
- Professor of Dermatology and Pathology
Education & Training
- Postdoctoral FellowUniversity of California, Los Angeles, CA (2004)
- ResidentUniversity of California, Irvine, CA (2003)
- InternUniversity of California, Los Angeles, CA (2000)
- MDNew York University School of Medicine (1999)
- BAPrinceton University (1995)
Additional Information
- AB of Dermatology, Dermatopathology (2004)
- American Medical Association (2023 - Present): Associate Editor
- Saeed S, Zhou A, Gehlhausen J, Ko C, Koumpouras F, Nelson C, Ramachandran S. Systemic lupus erythematosus-associated neutrophilic dermatoses. JAAD Case Reports 2026, 68: 43-47. DOI: 10.1016/j.jdcr.2025.10.063.
- Klimitz F, Shen Y, Repetto F, Brown S, Knoedler L, Ko C, Abu Hussein N, Crisler W, Adams T, Kaminski N, Lian C, Murphy G, Hsia H, Pomahac B, Kauke-Navarro M. Keratinocytes as active regulators of cutaneous and mucosal immunity: a systematic review across inflammatory epithelial disorders. Frontiers In Immunology 2025, 16: 1694066. DOI: 10.3389/fimmu.2025.1694066.
- Debenham L, Gehlhausen J, Ko C. Acquired perforating dermatosis and nephrogenic systemic fibrosis, the importance of framing and search satisficing. Journal Of The American Academy Of Dermatology 2025 PMID: 41390128, DOI: 10.1016/j.jaad.2025.12.028.
- Ko C, MacGibeny M, Choate K. Partial Spiky Acantholysis due to Loss of Desmosomal Attachments in Erythrokeratodermia Cardiomyopathy Syndrome. Journal Of Cutaneous Pathology 2025 PMID: 41255294, DOI: 10.1111/cup.70016.
- Stratman E, Schaffer J, Miller S, Ferringer T, Hick R, Ko C, Roenigk R. Dermatopathology Learning Needs Identified Through Continuing Certification Program Assessments of the American Board of Dermatology. Journal Of Cutaneous Pathology 2025 PMID: 41137500, DOI: 10.1111/cup.70003.
- Jiang X, Chen T, Hu R, Mortlock R, Ko C, Choate K. 0571 Linear epidermal nevus caused by a novel mosaic heterozygous PTPN11 variant. Journal Of Investigative Dermatology 2025, 145: s99. DOI: 10.1016/j.jid.2025.06.578.
- Singal A, Liu J, Cowper S, Ko C, Kroshinsky D, Lipner H, Robinson-Bostom L, Yosipovitch G, Lipner S. Part I. Dermatologic Manifestations in Patients with Kidney Disease. Journal Of The American Academy Of Dermatology 2025 PMID: 40543664, DOI: 10.1016/j.jaad.2025.06.035.
- Singal A, Cowper S, Ko C, Kroshinsky D, Lipner H, Robinson-Bostom L, Yosipovitch G, Lipner S. Part II. Dermatologic Manifestations Associated with Treatment of Patients with Kidney Disease. Journal Of The American Academy Of Dermatology 2025 PMID: 40543663, DOI: 10.1016/j.jaad.2025.06.034.
- Jiang X, Chen T, Hu R, Mortlock R, Ko C, Choate K. Linear epidermal naevus associated with a novel mosaic heterozygous PTPN11 variant. British Journal Of Dermatology 2025, 193: 568-570. PMID: 40442926, PMCID: PMC12360036, DOI: 10.1093/bjd/ljaf210.
- Gehlhausen J, Kong Y, Baker E, Ramachandran S, Koumpouras F, Ko C, Vesely M, Little A, Damsky W, King B, Iwasaki A. Cutaneous lupus features specialized stromal niches and altered retroelement expression. Journal Of Investigative Dermatology 2025 PMID: 40409678, PMCID: PMC12354343, DOI: 10.1016/j.jid.2025.04.033.
- Shahwan K, Walker T, Diede C, Nikahd M, Aasi S, Bordeaux J, Christensen S, Chung C, Elston D, Grant-Kels J, Ko C, Leitenberger J, Miller D, Piliang M, Robinson-Bostom L, Ruiz E, Tarbox M, Vidimos A, Carr D. Grading differentiation in cutaneous squamous cell carcinoma: A modified Delphi consensus panel. Journal Of The American Academy Of Dermatology 2025, 93: 781-784. PMID: 40345540, DOI: 10.1016/j.jaad.2025.05.003.
- Kauke-Navarro M, Huelsboemer L, Klimitz F, Diatta F, Knoedler L, Knoedler S, Crisler W, Brown S, Lian C, Repetto F, Clark R, Murphy G, Ko C, Pomahac B. A comparative analysis of lesional skin, sentinel flap, and mucosal biopsies in assessing acute face transplant rejection. Frontiers In Immunology 2025, 16: 1562024. PMID: 40236712, PMCID: PMC11997448, DOI: 10.3389/fimmu.2025.1562024.
- Jiang R, Zhou A, Ko C, Girardi M, Hanly A, Xie C, Preda-Naumescu A, Gehlhausen J, Tomayko M. Atypical bullous systemic lupus erythematosus with features of linear IgA bullous dermatosis. JAAD Case Reports 2025, 58: 74-76. PMID: 40129457, PMCID: PMC11930652, DOI: 10.1016/j.jdcr.2024.12.040.
- Huelsboemer L, Hosseini H, Klimitz F, Diatta F, Boroumand S, O'Brien C, Parikh N, Stögner V, Formica R, Ko C, Azzi J, Draper E, Lian C, Murphy G, Pomahac B, Kauke-Navarro M. The prognostic relevance of donor-specific antibodies in facial transplantation – A retrospective cohort study. Journal Of Plastic Reconstructive & Aesthetic Surgery 2025, 103: 286-296. PMID: 40043533, DOI: 10.1016/j.bjps.2025.01.028.
- Kauke-Navarro M, Crisler W, Younis N, Khetani R, Sadigh S, Teague J, Ho Sui S, Ko C, Zhan Q, Steuart S, Treister N, Pober J, Azzi J, Clark R, Pomahac B. B-cell infiltration distinguishes mucosal from skin patterns of rejection in facial vascularized composite allografts. American Journal Of Transplantation 2025, 25: 1193-1207. PMID: 39842779, DOI: 10.1016/j.ajt.2025.01.013.
- Junejo M, Harwood C, Ko C. Rethinking the Semantics of “Cutaneous Squamous Cell Carcinoma In Situ”. Journal Of Cutaneous Pathology 2024, 52: 336-338. PMID: 39739366, DOI: 10.1111/cup.14780.
- Kuan-Wen Wang S, Pan S, Panse G, McNiff J, Sinard J, Ko C. Insulinoma-associated protein 1: An important marker in eyelid tumors with adnexal features. Journal Of The American Academy Of Dermatology 2024, 92: 940-941. PMID: 39725215, DOI: 10.1016/j.jaad.2024.10.121.
- Ko C, McNiff J. The art of dermatopathology. Clinics In Dermatology 2024, 43: 211-215. PMID: 39701436, DOI: 10.1016/j.clindermatol.2024.12.004.
- Ko C, Odell I, Gehlhausen J, Leventhal J, McNiff J, Zubek A. VEXAS Syndrome: Histiocytoid Cells With Feathery Cytoplasm as a Clue to the Diagnosis. Journal Of Cutaneous Pathology 2024, 52: 108-112. PMID: 39610062, DOI: 10.1111/cup.14757.
- Wang S, Cowper S, Ko C. Cognitive bias: Chromoblastomycosis misdiagnosed as a giant cell tumor of soft tissue in a kidney transplant recipient. Journal Of The American Academy Of Dermatology 2024, 92: 668-669. PMID: 39549847, DOI: 10.1016/j.jaad.2024.10.087.
- Huelsboemer L, Kauke-Navarro M, Boroumand S, Parikh N, Hosseini H, Yu C, Stögner V, Ko C, Perry B, Formica R, Hung P, Mahajan A, Azzi J, Murphy G, Pomahac B. Ten-year follow-up after face transplantation—A single-center retrospective cohort study. American Journal Of Transplantation 2024, 25: 611-622. PMID: 39413877, PMCID: PMC12077232, DOI: 10.1016/j.ajt.2024.10.007.
- Huelsboemer L, Kauke-Navarro M, Boroumand S, Parikh N, Hosseini H, Yu C, Stögner V, Ko C, Perry B, Formica R, Hung P, Mahajan A, Azzi J, Murphy G, Pomahac B. D111. Ten year Follow up after Face Transplantation. Plastic & Reconstructive Surgery Global Open 2024, 12: 120-121. PMCID: PMC11340540, DOI: 10.1097/01.gox.0001018916.83172.5e.
- Ko C, Gehlhausen J, Cohen J, Croskerry P. Cognitive bias in the patient encounter: Part I. Background and significance. Journal Of The American Academy Of Dermatology 2024, 92: 213-220. PMID: 38588821, DOI: 10.1016/j.jaad.2024.01.091.
- Ko C, Gehlhausen J, Cohen J, Jiang Y, Myung P, Croskerry P. Cognitive bias in the patient encounter: Part II. Debiasing using an adaptive toolbox. Journal Of The American Academy Of Dermatology 2024, 92: 223-230. PMID: 38588820, DOI: 10.1016/j.jaad.2024.02.061.
- Hanly A, Turner N, Ko C, Panse G. Spiny Keratoderma: Clinical and Histopathological Findings in a Series of 3 Cases. American Journal Of Dermatopathology 2024, 46: 439-442. PMID: 38574081, DOI: 10.1097/dad.0000000000002705.
- Siegel J, Ko C. Using Shame as a Signal to Talk about Suicide. Clinical Chemistry 2024, 70: 786-788. PMID: 38441566, DOI: 10.1093/clinchem/hvae017.
- Lymphadenopathy and lymph node rejection following facial vascularized composite allotransplantationKauke-Navarro M, Sadigh S, Lee C, Panayi A, Knoedler L, Knoedler S, Stoegner V, Huelsboemer L, Jamil A, Ko C, Lian C, Murphy G, Pomahac B. Lymphadenopathy and lymph node rejection following facial vascularized composite allotransplantation. Journal Of Plastic Reconstructive & Aesthetic Surgery 2024, 91: 268-275. PMID: 38430863, DOI: 10.1016/j.bjps.2024.02.024.
- Niu N, Roy S, Ko C. A pilot study of p53 immunohistochemistry in atypical squamous lesions, using a vulvar scoring system. Journal Of Cutaneous Pathology 2024, 51: 379-386. PMID: 38317537, DOI: 10.1111/cup.14591.
- Turner N, Ko C, McNiff J, Galan A. Pitfalls of PRAME Immunohistochemistry in a Large Series of Melanocytic and Nonmelanocytic Lesions With Literature Review. American Journal Of Dermatopathology 2024, 46: 21-30. PMID: 37982498, DOI: 10.1097/dad.0000000000002584.
- Tang H, McNiff J, Glusac E, Ko C. PRAME‐negativity in sclerosing nevi with pseudomelanomatous features supports classification as an indolent lesion. Journal Of Cutaneous Pathology 2023, 50: 1001-1005. PMID: 37565491, DOI: 10.1111/cup.14505.
- Xu S, Patrignelli R, Ramachandran S, Koumpouras F, Desir D, Ko C, Gehlhausen J. Vascular-Targeted Therapy for Systemic Lupus Erythematosus–Associated Vasculitis. JAMA Dermatology 2023, 159: 460-462. PMID: 36884229, DOI: 10.1001/jamadermatol.2023.0077.
- Tang H, Seykora J, Ko C. Squamous carcinogenesis: potential truncal mutations. Human Pathology 2023, 140: 32-38. PMID: 37001739, DOI: 10.1016/j.humpath.2023.03.016.
- Ko C, Glusac E. Cognitive bias in pathology, as exemplified in dermatopathology. Human Pathology 2023, 140: 267-275. PMID: 36906184, DOI: 10.1016/j.humpath.2023.03.003.
- Chen J, Murphy M, Singh K, Wang A, Chow R, Kim R, Cohen J, Ko C, Damsky W. IL17A mRNA Staining Distinguishes Palmoplantar Psoriasis from Hyperkeratotic Palmoplantar Eczema in Diagnostic Skin Biopsies. JID Innovations 2023, 3: 100189. PMID: 37205304, PMCID: PMC10186614, DOI: 10.1016/j.xjidi.2023.100189.
- Belzer A, Ko C, Leventhal J. 003 Atypical bullous pemphigoid due to radiation therapy. Journal Of Investigative Dermatology 2022, 142: s1. DOI: 10.1016/j.jid.2022.05.057.
- Ugwu N, Atzmony L, Ellis K, Panse G, Jain D, Ko C, Nassiri N, Choate K. LB731 GJA4 somatic mutations drive venous malformation in the skin and liver and reveal a novel pathway for therapeutic intervention. Journal Of Investigative Dermatology 2021, 141: b8. DOI: 10.1016/j.jid.2021.07.021.
- Ko CJ, Harigopal M, Gehlhausen JR, Bosenberg M, McNiff JM, Damsky W. Discordant anti‐SARS‐CoV‐2 spike protein and RNA staining in cutaneous perniotic lesions suggests endothelial deposition of cleaved spike protein. Journal Of Cutaneous Pathology 2020, 48: 47-52. PMID: 32895985, DOI: 10.1111/cup.13866.
- Ko CJ, Harigopal M, Damsky W, Gehlhausen JR, Bosenberg M, Patrignelli R, McNiff JM. Perniosis during the COVID‐19 pandemic: Negative anti‐SARS‐CoV‐2 immunohistochemistry in six patients and comparison to perniosis before the emergence of SARS‐CoV‐2. Journal Of Cutaneous Pathology 2020, 47: 997-1002. PMID: 32745281, PMCID: PMC7436569, DOI: 10.1111/cup.13830.
- Gehlhausen JR, Wetter DA, Nelson C, Ramachandran S, McNiff JM, Ko CJ. A detailed analysis of the distribution, morphology, and histopathology of complex purpura in hospitalized patients: A case series of 68 patients. Journal Of The American Academy Of Dermatology 2020, 84: 1188-1196. PMID: 32376433, DOI: 10.1016/j.jaad.2020.04.149.
- Siegel J, Ko C. Diltiazem-associated Photodistributed Hyperpigmentation. The Yale Journal Of Biology And Medicine 2020, 93: 45-47. PMID: 32226335, PMCID: PMC7087047.
- Ring NG, Craiglow BG, Panse G, Antaya RJ, Ashack K, Ashack R, Faith EF, Paller AS, McNiff JM, Choate KA, Ko CJ. Histopathologic findings characteristic of CARD14‐associated papulosquamous eruption. Journal Of Cutaneous Pathology 2019, 47: 425-430. PMID: 31849081, DOI: 10.1111/cup.13633.
- Atzmony L, Khan H, Lim Y, Paller A, Levinsohn J, Holland K, Mirza F, Yin E, Ko C, Leventhal J, Choate K. 390 Second-hit, post-zygotic PMVKand MVD mutations cause linear porokeratosis. Journal Of Investigative Dermatology 2019, 139: s67. DOI: 10.1016/j.jid.2019.03.466.
- Ko CJ, Braverman I, Sidlow R, Lowenstein EJ. Visual perception, cognition, and error in dermatologic diagnosis: Key cognitive principles. Journal Of The American Academy Of Dermatology 2019, 81: 1227-1234. PMID: 30797839, DOI: 10.1016/j.jaad.2018.10.082.
- Lowenstein EJ, Sidlow R, Ko C. Visual perception, cognition, and error in dermatologic diagnosis: Diagnosis and error. Journal Of The American Academy Of Dermatology 2019, 81: 1237-1245. PMID: 30797841, DOI: 10.1016/j.jaad.2018.12.072.
- Kibbi N, Suozzi K, Ko C, Leffell D. Squamous Cell Carcinoma of the Lip in a Patient With Graft-Versus-Host Disease. Dermatologic Surgery 2018, 1. DOI: 10.1097/00042728-900000000-98571.
- Lim Y, Bacchiocchi A, Qiu J, Bruckner A, Bercovitch L, Narayan D, McNiff J, Ko C, Robinson-Bostom L, Antaya R, Halaban R, Choate K. 513 GNA14 somatic mutation causes congenital and sporadic vascular tumors by MAPK activation. Journal Of Investigative Dermatology 2017, 137: s88. DOI: 10.1016/j.jid.2017.02.533.
- Ko C, Elston D. 30 Pediculosis. 2017, 387-392. DOI: 10.1016/b978-0-323-29634-2.00030-4.
- Lim YH, Fisher JM, Bosenberg MW, Choate KA, Ko CJ. Keratoacanthoma Shares Driver Mutations with Cutaneous Squamous Cell Carcinoma. Journal Of Investigative Dermatology 2016, 136: 1737-1741. PMID: 27283355, DOI: 10.1016/j.jid.2016.04.002.
- Zito G, Saotome I, Liu Z, Ferro EG, Sun TY, Nguyen DX, Bilguvar K, Ko CJ, Greco V. Spontaneous tumour regression in keratoacanthomas is driven by Wnt/retinoic acid signalling cross-talk. Nature Communications 2014, 5: 3543. PMID: 24667544, PMCID: PMC3974217, DOI: 10.1038/ncomms4543.
- Ferringer T, Ko C. Chapter 1 The basics Diagnostic terms, skin anatomy, and stains. 2014, 1-36. DOI: 10.1016/b978-0-7020-5527-0.00001-7.
- Elston D, Ferringer T, Ko C, High W, Peckham S, DiCaudo D. Dedications. 2014, x. DOI: 10.1016/b978-0-7020-5527-0.00039-x.
- Ko C, Ferringer T. Chapter 20a Key diagnostic features of additional soft tissue neoplasms. 2014, e1-e5. DOI: 10.1016/b978-0-7020-5527-0.00078-9.
- Kim C, Ko CJ, Leffell DJ. Cutaneous squamous cell carcinomas of the lower extremity: A distinct subset of squamous cell carcinomas. Journal Of The American Academy Of Dermatology 2013, 70: 70-74. PMID: 24210370, DOI: 10.1016/j.jaad.2013.09.026.
- Ko C, Cowper S. Chapter 59 Dermatologic Conditions in Kidney Disease. 2012, 2156-2168. DOI: 10.1016/b978-1-4160-6193-9.10059-4.
- Ferringer T, Ko C. Chapter 1 The basics: diagnostic terms, skin anatomy, and stains. 2009, 1-31. DOI: 10.1016/b978-0-7020-3023-9.10001-0.
- Skvarka C, Ko C. Chapter 13 Lichenoid dermatoses. 2009, 197-213. DOI: 10.1016/b978-0-7020-3093-2.10013-5.
- Ko C, Elston D. Chapter 30 Pediculosis. 2006, 387-392. DOI: 10.1016/b978-0-443-06790-7.50034-x.
- Elston D, Ko C. Reply. Journal Of The American Academy Of Dermatology 2004, 51: 1037-1038. DOI: 10.1016/j.jaad.2004.04.042.
- KO C, COHEN H. Intraethnic Comparison of Eating Attitudes in Native Koreans and Korean Americans Using a Korean Translation of the Eating Attitudes Test. The Journal Of Nervous And Mental Disease 1998, 186: 631-636. PMID: 9788640, DOI: 10.1097/00005053-199810000-00007.
- Yale New Haven Transplantation Center - DermatologyYale Physicians Building800 Howard Avenue, Fl 4th floorNew Haven, CT 06519
- Yale DermatopathologyLaboratory for Medicine and Pediatrics (LMP)15 York Street, Fl 5th floor Ste Dermatopathology Rm LMP 5031New Haven, CT 06510
Biography
Dermatologist Christine J. Ko, MD, prides herself on being able to provide patients with an accurate diagnosis so they can have the most effective treatment possible. Just as important to her are the relationships she forms with her patients, whether they are adults, adolescents or children. “I try to treat patients as I would a family member with the same condition,” she says.
In addition to being a clinical dermatologist, Dr. Ko is also a skin pathologist, or dermatopathologist. This additional training helps her to better evaluate skin biopsies for her patients.
Dermatopathology is a key part of dermatology, says Dr. Ko. “The correct diagnosis often rests on a careful correlation between clinical and microscopic findings, something that is especially important for complex cases,” she says. “We can arrive at this diagnosis by reviewing prior biopsies, taking new biopsies, and consulting our team of dermatologists and dermatopathologists at our weekly Grand Rounds meetings.”
A professor of dermatology and dermatopathology at Yale School of Medicine, Dr. Ko is particularly interested in skin cancer. “One of my passions is to better understand the mechanisms of squamous cell carcinogenesis,” says Dr. Ko. This is one of the most common types of skin cancer today and is highly treatable if detected early, she says.
Titles
- Professor of Dermatology and Pathology
Education & Training
- Postdoctoral FellowUniversity of California, Los Angeles, CA (2004)
- ResidentUniversity of California, Irvine, CA (2003)
- InternUniversity of California, Los Angeles, CA (2000)
- MDNew York University School of Medicine (1999)
- BAPrinceton University (1995)
Additional Information
- AB of Dermatology, Dermatopathology (2004)
- American Medical Association (2023 - Present): Associate Editor
- Saeed S, Zhou A, Gehlhausen J, Ko C, Koumpouras F, Nelson C, Ramachandran S. Systemic lupus erythematosus-associated neutrophilic dermatoses. JAAD Case Reports 2026, 68: 43-47. DOI: 10.1016/j.jdcr.2025.10.063.
- Klimitz F, Shen Y, Repetto F, Brown S, Knoedler L, Ko C, Abu Hussein N, Crisler W, Adams T, Kaminski N, Lian C, Murphy G, Hsia H, Pomahac B, Kauke-Navarro M. Keratinocytes as active regulators of cutaneous and mucosal immunity: a systematic review across inflammatory epithelial disorders. Frontiers In Immunology 2025, 16: 1694066. DOI: 10.3389/fimmu.2025.1694066.
- Debenham L, Gehlhausen J, Ko C. Acquired perforating dermatosis and nephrogenic systemic fibrosis, the importance of framing and search satisficing. Journal Of The American Academy Of Dermatology 2025 PMID: 41390128, DOI: 10.1016/j.jaad.2025.12.028.
- Ko C, MacGibeny M, Choate K. Partial Spiky Acantholysis due to Loss of Desmosomal Attachments in Erythrokeratodermia Cardiomyopathy Syndrome. Journal Of Cutaneous Pathology 2025 PMID: 41255294, DOI: 10.1111/cup.70016.
- Stratman E, Schaffer J, Miller S, Ferringer T, Hick R, Ko C, Roenigk R. Dermatopathology Learning Needs Identified Through Continuing Certification Program Assessments of the American Board of Dermatology. Journal Of Cutaneous Pathology 2025 PMID: 41137500, DOI: 10.1111/cup.70003.
- Jiang X, Chen T, Hu R, Mortlock R, Ko C, Choate K. 0571 Linear epidermal nevus caused by a novel mosaic heterozygous PTPN11 variant. Journal Of Investigative Dermatology 2025, 145: s99. DOI: 10.1016/j.jid.2025.06.578.
- Singal A, Liu J, Cowper S, Ko C, Kroshinsky D, Lipner H, Robinson-Bostom L, Yosipovitch G, Lipner S. Part I. Dermatologic Manifestations in Patients with Kidney Disease. Journal Of The American Academy Of Dermatology 2025 PMID: 40543664, DOI: 10.1016/j.jaad.2025.06.035.
- Singal A, Cowper S, Ko C, Kroshinsky D, Lipner H, Robinson-Bostom L, Yosipovitch G, Lipner S. Part II. Dermatologic Manifestations Associated with Treatment of Patients with Kidney Disease. Journal Of The American Academy Of Dermatology 2025 PMID: 40543663, DOI: 10.1016/j.jaad.2025.06.034.
- Jiang X, Chen T, Hu R, Mortlock R, Ko C, Choate K. Linear epidermal naevus associated with a novel mosaic heterozygous PTPN11 variant. British Journal Of Dermatology 2025, 193: 568-570. PMID: 40442926, PMCID: PMC12360036, DOI: 10.1093/bjd/ljaf210.
- Gehlhausen J, Kong Y, Baker E, Ramachandran S, Koumpouras F, Ko C, Vesely M, Little A, Damsky W, King B, Iwasaki A. Cutaneous lupus features specialized stromal niches and altered retroelement expression. Journal Of Investigative Dermatology 2025 PMID: 40409678, PMCID: PMC12354343, DOI: 10.1016/j.jid.2025.04.033.
- Shahwan K, Walker T, Diede C, Nikahd M, Aasi S, Bordeaux J, Christensen S, Chung C, Elston D, Grant-Kels J, Ko C, Leitenberger J, Miller D, Piliang M, Robinson-Bostom L, Ruiz E, Tarbox M, Vidimos A, Carr D. Grading differentiation in cutaneous squamous cell carcinoma: A modified Delphi consensus panel. Journal Of The American Academy Of Dermatology 2025, 93: 781-784. PMID: 40345540, DOI: 10.1016/j.jaad.2025.05.003.
- Kauke-Navarro M, Huelsboemer L, Klimitz F, Diatta F, Knoedler L, Knoedler S, Crisler W, Brown S, Lian C, Repetto F, Clark R, Murphy G, Ko C, Pomahac B. A comparative analysis of lesional skin, sentinel flap, and mucosal biopsies in assessing acute face transplant rejection. Frontiers In Immunology 2025, 16: 1562024. PMID: 40236712, PMCID: PMC11997448, DOI: 10.3389/fimmu.2025.1562024.
- Jiang R, Zhou A, Ko C, Girardi M, Hanly A, Xie C, Preda-Naumescu A, Gehlhausen J, Tomayko M. Atypical bullous systemic lupus erythematosus with features of linear IgA bullous dermatosis. JAAD Case Reports 2025, 58: 74-76. PMID: 40129457, PMCID: PMC11930652, DOI: 10.1016/j.jdcr.2024.12.040.
- Huelsboemer L, Hosseini H, Klimitz F, Diatta F, Boroumand S, O'Brien C, Parikh N, Stögner V, Formica R, Ko C, Azzi J, Draper E, Lian C, Murphy G, Pomahac B, Kauke-Navarro M. The prognostic relevance of donor-specific antibodies in facial transplantation – A retrospective cohort study. Journal Of Plastic Reconstructive & Aesthetic Surgery 2025, 103: 286-296. PMID: 40043533, DOI: 10.1016/j.bjps.2025.01.028.
- Kauke-Navarro M, Crisler W, Younis N, Khetani R, Sadigh S, Teague J, Ho Sui S, Ko C, Zhan Q, Steuart S, Treister N, Pober J, Azzi J, Clark R, Pomahac B. B-cell infiltration distinguishes mucosal from skin patterns of rejection in facial vascularized composite allografts. American Journal Of Transplantation 2025, 25: 1193-1207. PMID: 39842779, DOI: 10.1016/j.ajt.2025.01.013.
- Junejo M, Harwood C, Ko C. Rethinking the Semantics of “Cutaneous Squamous Cell Carcinoma In Situ”. Journal Of Cutaneous Pathology 2024, 52: 336-338. PMID: 39739366, DOI: 10.1111/cup.14780.
- Kuan-Wen Wang S, Pan S, Panse G, McNiff J, Sinard J, Ko C. Insulinoma-associated protein 1: An important marker in eyelid tumors with adnexal features. Journal Of The American Academy Of Dermatology 2024, 92: 940-941. PMID: 39725215, DOI: 10.1016/j.jaad.2024.10.121.
- Ko C, McNiff J. The art of dermatopathology. Clinics In Dermatology 2024, 43: 211-215. PMID: 39701436, DOI: 10.1016/j.clindermatol.2024.12.004.
- Ko C, Odell I, Gehlhausen J, Leventhal J, McNiff J, Zubek A. VEXAS Syndrome: Histiocytoid Cells With Feathery Cytoplasm as a Clue to the Diagnosis. Journal Of Cutaneous Pathology 2024, 52: 108-112. PMID: 39610062, DOI: 10.1111/cup.14757.
- Wang S, Cowper S, Ko C. Cognitive bias: Chromoblastomycosis misdiagnosed as a giant cell tumor of soft tissue in a kidney transplant recipient. Journal Of The American Academy Of Dermatology 2024, 92: 668-669. PMID: 39549847, DOI: 10.1016/j.jaad.2024.10.087.
- Huelsboemer L, Kauke-Navarro M, Boroumand S, Parikh N, Hosseini H, Yu C, Stögner V, Ko C, Perry B, Formica R, Hung P, Mahajan A, Azzi J, Murphy G, Pomahac B. Ten-year follow-up after face transplantation—A single-center retrospective cohort study. American Journal Of Transplantation 2024, 25: 611-622. PMID: 39413877, PMCID: PMC12077232, DOI: 10.1016/j.ajt.2024.10.007.
- Huelsboemer L, Kauke-Navarro M, Boroumand S, Parikh N, Hosseini H, Yu C, Stögner V, Ko C, Perry B, Formica R, Hung P, Mahajan A, Azzi J, Murphy G, Pomahac B. D111. Ten year Follow up after Face Transplantation. Plastic & Reconstructive Surgery Global Open 2024, 12: 120-121. PMCID: PMC11340540, DOI: 10.1097/01.gox.0001018916.83172.5e.
- Ko C, Gehlhausen J, Cohen J, Croskerry P. Cognitive bias in the patient encounter: Part I. Background and significance. Journal Of The American Academy Of Dermatology 2024, 92: 213-220. PMID: 38588821, DOI: 10.1016/j.jaad.2024.01.091.
- Ko C, Gehlhausen J, Cohen J, Jiang Y, Myung P, Croskerry P. Cognitive bias in the patient encounter: Part II. Debiasing using an adaptive toolbox. Journal Of The American Academy Of Dermatology 2024, 92: 223-230. PMID: 38588820, DOI: 10.1016/j.jaad.2024.02.061.
- Hanly A, Turner N, Ko C, Panse G. Spiny Keratoderma: Clinical and Histopathological Findings in a Series of 3 Cases. American Journal Of Dermatopathology 2024, 46: 439-442. PMID: 38574081, DOI: 10.1097/dad.0000000000002705.
- Siegel J, Ko C. Using Shame as a Signal to Talk about Suicide. Clinical Chemistry 2024, 70: 786-788. PMID: 38441566, DOI: 10.1093/clinchem/hvae017.
- Lymphadenopathy and lymph node rejection following facial vascularized composite allotransplantationKauke-Navarro M, Sadigh S, Lee C, Panayi A, Knoedler L, Knoedler S, Stoegner V, Huelsboemer L, Jamil A, Ko C, Lian C, Murphy G, Pomahac B. Lymphadenopathy and lymph node rejection following facial vascularized composite allotransplantation. Journal Of Plastic Reconstructive & Aesthetic Surgery 2024, 91: 268-275. PMID: 38430863, DOI: 10.1016/j.bjps.2024.02.024.
- Niu N, Roy S, Ko C. A pilot study of p53 immunohistochemistry in atypical squamous lesions, using a vulvar scoring system. Journal Of Cutaneous Pathology 2024, 51: 379-386. PMID: 38317537, DOI: 10.1111/cup.14591.
- Turner N, Ko C, McNiff J, Galan A. Pitfalls of PRAME Immunohistochemistry in a Large Series of Melanocytic and Nonmelanocytic Lesions With Literature Review. American Journal Of Dermatopathology 2024, 46: 21-30. PMID: 37982498, DOI: 10.1097/dad.0000000000002584.
- Tang H, McNiff J, Glusac E, Ko C. PRAME‐negativity in sclerosing nevi with pseudomelanomatous features supports classification as an indolent lesion. Journal Of Cutaneous Pathology 2023, 50: 1001-1005. PMID: 37565491, DOI: 10.1111/cup.14505.
- Xu S, Patrignelli R, Ramachandran S, Koumpouras F, Desir D, Ko C, Gehlhausen J. Vascular-Targeted Therapy for Systemic Lupus Erythematosus–Associated Vasculitis. JAMA Dermatology 2023, 159: 460-462. PMID: 36884229, DOI: 10.1001/jamadermatol.2023.0077.
- Tang H, Seykora J, Ko C. Squamous carcinogenesis: potential truncal mutations. Human Pathology 2023, 140: 32-38. PMID: 37001739, DOI: 10.1016/j.humpath.2023.03.016.
- Ko C, Glusac E. Cognitive bias in pathology, as exemplified in dermatopathology. Human Pathology 2023, 140: 267-275. PMID: 36906184, DOI: 10.1016/j.humpath.2023.03.003.
- Chen J, Murphy M, Singh K, Wang A, Chow R, Kim R, Cohen J, Ko C, Damsky W. IL17A mRNA Staining Distinguishes Palmoplantar Psoriasis from Hyperkeratotic Palmoplantar Eczema in Diagnostic Skin Biopsies. JID Innovations 2023, 3: 100189. PMID: 37205304, PMCID: PMC10186614, DOI: 10.1016/j.xjidi.2023.100189.
- Belzer A, Ko C, Leventhal J. 003 Atypical bullous pemphigoid due to radiation therapy. Journal Of Investigative Dermatology 2022, 142: s1. DOI: 10.1016/j.jid.2022.05.057.
- Ugwu N, Atzmony L, Ellis K, Panse G, Jain D, Ko C, Nassiri N, Choate K. LB731 GJA4 somatic mutations drive venous malformation in the skin and liver and reveal a novel pathway for therapeutic intervention. Journal Of Investigative Dermatology 2021, 141: b8. DOI: 10.1016/j.jid.2021.07.021.
- Ko CJ, Harigopal M, Gehlhausen JR, Bosenberg M, McNiff JM, Damsky W. Discordant anti‐SARS‐CoV‐2 spike protein and RNA staining in cutaneous perniotic lesions suggests endothelial deposition of cleaved spike protein. Journal Of Cutaneous Pathology 2020, 48: 47-52. PMID: 32895985, DOI: 10.1111/cup.13866.
- Ko CJ, Harigopal M, Damsky W, Gehlhausen JR, Bosenberg M, Patrignelli R, McNiff JM. Perniosis during the COVID‐19 pandemic: Negative anti‐SARS‐CoV‐2 immunohistochemistry in six patients and comparison to perniosis before the emergence of SARS‐CoV‐2. Journal Of Cutaneous Pathology 2020, 47: 997-1002. PMID: 32745281, PMCID: PMC7436569, DOI: 10.1111/cup.13830.
- Gehlhausen JR, Wetter DA, Nelson C, Ramachandran S, McNiff JM, Ko CJ. A detailed analysis of the distribution, morphology, and histopathology of complex purpura in hospitalized patients: A case series of 68 patients. Journal Of The American Academy Of Dermatology 2020, 84: 1188-1196. PMID: 32376433, DOI: 10.1016/j.jaad.2020.04.149.
- Siegel J, Ko C. Diltiazem-associated Photodistributed Hyperpigmentation. The Yale Journal Of Biology And Medicine 2020, 93: 45-47. PMID: 32226335, PMCID: PMC7087047.
- Ring NG, Craiglow BG, Panse G, Antaya RJ, Ashack K, Ashack R, Faith EF, Paller AS, McNiff JM, Choate KA, Ko CJ. Histopathologic findings characteristic of CARD14‐associated papulosquamous eruption. Journal Of Cutaneous Pathology 2019, 47: 425-430. PMID: 31849081, DOI: 10.1111/cup.13633.
- Atzmony L, Khan H, Lim Y, Paller A, Levinsohn J, Holland K, Mirza F, Yin E, Ko C, Leventhal J, Choate K. 390 Second-hit, post-zygotic PMVKand MVD mutations cause linear porokeratosis. Journal Of Investigative Dermatology 2019, 139: s67. DOI: 10.1016/j.jid.2019.03.466.
- Ko CJ, Braverman I, Sidlow R, Lowenstein EJ. Visual perception, cognition, and error in dermatologic diagnosis: Key cognitive principles. Journal Of The American Academy Of Dermatology 2019, 81: 1227-1234. PMID: 30797839, DOI: 10.1016/j.jaad.2018.10.082.
- Lowenstein EJ, Sidlow R, Ko C. Visual perception, cognition, and error in dermatologic diagnosis: Diagnosis and error. Journal Of The American Academy Of Dermatology 2019, 81: 1237-1245. PMID: 30797841, DOI: 10.1016/j.jaad.2018.12.072.
- Kibbi N, Suozzi K, Ko C, Leffell D. Squamous Cell Carcinoma of the Lip in a Patient With Graft-Versus-Host Disease. Dermatologic Surgery 2018, 1. DOI: 10.1097/00042728-900000000-98571.
- Lim Y, Bacchiocchi A, Qiu J, Bruckner A, Bercovitch L, Narayan D, McNiff J, Ko C, Robinson-Bostom L, Antaya R, Halaban R, Choate K. 513 GNA14 somatic mutation causes congenital and sporadic vascular tumors by MAPK activation. Journal Of Investigative Dermatology 2017, 137: s88. DOI: 10.1016/j.jid.2017.02.533.
- Ko C, Elston D. 30 Pediculosis. 2017, 387-392. DOI: 10.1016/b978-0-323-29634-2.00030-4.
- Lim YH, Fisher JM, Bosenberg MW, Choate KA, Ko CJ. Keratoacanthoma Shares Driver Mutations with Cutaneous Squamous Cell Carcinoma. Journal Of Investigative Dermatology 2016, 136: 1737-1741. PMID: 27283355, DOI: 10.1016/j.jid.2016.04.002.
- Zito G, Saotome I, Liu Z, Ferro EG, Sun TY, Nguyen DX, Bilguvar K, Ko CJ, Greco V. Spontaneous tumour regression in keratoacanthomas is driven by Wnt/retinoic acid signalling cross-talk. Nature Communications 2014, 5: 3543. PMID: 24667544, PMCID: PMC3974217, DOI: 10.1038/ncomms4543.
- Ferringer T, Ko C. Chapter 1 The basics Diagnostic terms, skin anatomy, and stains. 2014, 1-36. DOI: 10.1016/b978-0-7020-5527-0.00001-7.
- Elston D, Ferringer T, Ko C, High W, Peckham S, DiCaudo D. Dedications. 2014, x. DOI: 10.1016/b978-0-7020-5527-0.00039-x.
- Ko C, Ferringer T. Chapter 20a Key diagnostic features of additional soft tissue neoplasms. 2014, e1-e5. DOI: 10.1016/b978-0-7020-5527-0.00078-9.
- Kim C, Ko CJ, Leffell DJ. Cutaneous squamous cell carcinomas of the lower extremity: A distinct subset of squamous cell carcinomas. Journal Of The American Academy Of Dermatology 2013, 70: 70-74. PMID: 24210370, DOI: 10.1016/j.jaad.2013.09.026.
- Ko C, Cowper S. Chapter 59 Dermatologic Conditions in Kidney Disease. 2012, 2156-2168. DOI: 10.1016/b978-1-4160-6193-9.10059-4.
- Ferringer T, Ko C. Chapter 1 The basics: diagnostic terms, skin anatomy, and stains. 2009, 1-31. DOI: 10.1016/b978-0-7020-3023-9.10001-0.
- Skvarka C, Ko C. Chapter 13 Lichenoid dermatoses. 2009, 197-213. DOI: 10.1016/b978-0-7020-3093-2.10013-5.
- Ko C, Elston D. Chapter 30 Pediculosis. 2006, 387-392. DOI: 10.1016/b978-0-443-06790-7.50034-x.
- Elston D, Ko C. Reply. Journal Of The American Academy Of Dermatology 2004, 51: 1037-1038. DOI: 10.1016/j.jaad.2004.04.042.
- KO C, COHEN H. Intraethnic Comparison of Eating Attitudes in Native Koreans and Korean Americans Using a Korean Translation of the Eating Attitudes Test. The Journal Of Nervous And Mental Disease 1998, 186: 631-636. PMID: 9788640, DOI: 10.1097/00005053-199810000-00007.
- Yale New Haven Transplantation Center - DermatologyYale Physicians Building800 Howard Avenue, Fl 4th floorNew Haven, CT 06519
- Yale DermatopathologyLaboratory for Medicine and Pediatrics (LMP)15 York Street, Fl 5th floor Ste Dermatopathology Rm LMP 5031New Haven, CT 06510
- Yale New Haven Transplantation Center - DermatologyYale Physicians Building800 Howard Avenue, Fl 4th floorNew Haven, CT 06519
- Yale DermatopathologyLaboratory for Medicine and Pediatrics (LMP)15 York Street, Fl 5th floor Ste Dermatopathology Rm LMP 5031New Haven, CT 06510