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Firm dermal papule or nodule
Overlying black comedone or "punctum"
Expressible foul-smelling cheesy material
May become red and drain, mimicking an abscess
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Benign growths of the upper portion of the hair follicle
Common in Gardner syndrome and may be the first sign of the condition
Favor the face and trunk
May complicate nodulocystic acne vulgaris
Individual lesions range in size from 0.3 cm to several centimeters
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Not required if asymptomatic
Inflamed lesions may be treated with incision and drainage or intralesional triamcinolone acetonide 5–10 mg/mL
For large or symptomatic cysts, surgical excision is curative