A closed comedo is not open to the skin's surface and is commonly known as a whitehead. An open comedo typically has a dark appearance where air has oxidized the melanin pigment in it, and it is known ...

Surgery for rheumatoid arthritis is typically used only when all other treatments have not worked. The type of surgery may depend on the affected joint and the severity of the damage. Healthcare ...

Mohs surgery is a highly specialized technique for treating skin cancer. Johns Hopkins dermatologic surgeon Elise Ng, M.D., explains the procedure. Mohs surgery is a precise and effective surgical ...