Epidermal Inclusion Cyst

EPIDERMAL INCLUSION CYST (also known as SEBACEOUS CYST, FOLLICULAR HAIR CYST)
An epidermal inclusion cyst is a benign growth composed of an incomplete hair follicle-oil gland lining, filled with keratin. The produced keratin becomes compact into a cheese-like material. They sometimes have a small opening from which the malodorous keratin can be expressed or no surface opening, which appears as a smooth bump underneath the skin surface. They often grow to a certain size then stay. If the cyst lining ruptures, a boil or abscess can form.

Surgery is the preferred technique for removing cysts.

(Photo Above: Epidermal Inclusion Cyst treated by incision & drainage resulting in scar & recurrence)

Epidermal Inclusion Cyst Under Microscope