Category Pathology

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Introduction Virtually any tumor can metastasize to the skin, but some do so more often than others. The identification of the primary site is not always easy, and this process is further complicated by the occurrence of primary adnexal tumors…

Introduction A renewed interest in vascular tumors was provoked by the emergence of AIDS-related Kaposi's sarcoma in the 1980s, and since then a number of new entities have been described. Although many of these are rare, they may produce diagnostic…

Introduction Neural tumors are an important category of cutaneous tumors. Al­though the vast majority of them can be diagnosed without difficulty, there are cases that require distinction from other spindle cell tumors, including melanoma. Markers are still being sought that…

Tumors of Smooth Muscle Smooth muscle is found in the skin in three distinct settings: the arrector pili muscles; the walls of blood vessels; and the specialized muscle of genital skin, which includes the scrotum (dartos muscle), vulva, and nipple…

The role of subcutaneous fat and the consequences of its increase and decrease have received little attention in the dermatological literature until comparatively recently. There are two types of adipose tissue, white and brown, that have different roles in energy…