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Epidermoid cysts can appear anywhere on the skin, but are most common on the face, neck and trunk. Slow growing and often painless, epidermoid cysts rarely cause problems or need treatment.
Symptoms: The scalp, ears, back, face, and upper arm, are common sites for sebaceous cysts, though they may occur anywhere on the body except the palms of the hands and soles of the feet. In males a common place for them to develop is the scrotum and chest. Causes: Hereditary causes of sebaceous cysts include Gardner's syndrome and basal cell nevus syndrome.
Treament: There are three general approaches used: traditional wide excision, minimal excision, and punch biopsy excision. An infected cyst may require oral antibiotics or other treatment before or after excision. If pus has already formed then incision and drainage should be done along with avulsion of cyst wall with proper antibiotics coverage.
Epidemology: They are around twice as common in men as in women and most frequent in those aged in their 20s and 30s. Simple epidermoid cysts can run in families. Pilar cysts occur in 5-10% of the population. Over 90% occur on the scalp, where pilar cysts are the most common cutaneous cyst.