Fact Sheets

Clostridium difficile ( C. diff )
A type of bacteria, Clostridium difficile ( C. diff ), causes one of the most common health care-associated infections in the United States.
Abdominal Migraine: Symptoms, Diagnosis & Treatment
Abdominal migraine is a difficult-to-diagnose condition characterized by stomach pain, nausea, and vomiting. Learn about symptoms and treatment.
Abdominal Pain
Abdominal pain is a common symptom; emergency medicine doctors use physical exams and other tools to diagnose its cause.
Abnormal Uterine Bleeding
Abnormal uterine bleeding—or menstrual bleeding that is unpredictable in timing, amount or duration—is a common problem among women. Learn about symptoms and treatment.
Achalasia
Achalasia is a disorder of the esophagus that makes it difficult to swallow food and liquids.
ACL Surgery
Surgery may be the most appropriate option to treat a common sports injury in the knee involving a sprain or tear in the anterior cruciate ligament (ACL).
Acne (Acne Vulgaris)
Acne is a skin condition characterized by pimples, blackheads, and whiteheads on the face, back, and chest. Learn about symptoms and treatment.
Acoustic Neuroma
Though an acoustic neuroma (a tumor on a nerve connecting the brain and ear) is usually benign, it can affect hearing and balance.
Actinic Keratosis (AK)
Actinic keratosis (AK) is scaly and rough patch of skin caused by long-term damage from the sun. It is an important indicator of increased skin cancer risk. Learn about symptoms, risk factors, diagnosis, and treatment.
Acute Kidney Injury (AKI)
Acute kidney injury is an episode of sudden kidney damage or failure.