Epidermal inclusion cyst

Caused by invagination of the epidermal elements into the subcutaneous tissue as a result of trauma.

Appears as round, non-transluminating lesion, which is slow growing.

Often there is a white head at the crux of the nodule.

May become infected, usually with a staphylococci or streptococcus organism.

Usually asymptomatic.

Treatment includes surgical removal of the lesion with its lining.

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