A comedo is a type of acne caused by pores that have become clogged with excess bacteria, oil, and dead skin cells. These ...

A blackhead is one type of comedo, or acne bump. Comedones can be open or closed, based on whether the skin surface is disrupted. Since blackheads disrupt the skin surface, they are referred to as ...

Some common descriptive terms of primary lesions are macule, papule, nodule, plaque, wheal, vesicle, bulla, pustule, cyst, comedo, and burrow. Secondary lesions are the patient's response to a ...

Comedo: a term that refers to the gross appearance of certain duct carcinomas in situ in which central areas of necrotic tumor cells accumulate. These were initially seen to resemble comedones of ...

Many of these neoplasms have solid sheets and nodular masses of neoplastic cells; some have central areas of necrosis (comedo pattern) 4. The architecture of the present tumor was consistent with ...