Sprouting epidermoid cysts.
Five unusually shaped (i.e. 'sprouting') epidermoid cysts in the upper lip, elbow and foot are reported. The tumours seldom produced symptoms. The maximum diameter was 25-48 mm. The complete removal including a sprouting bud is necessary. Histologically, partial to complete cyst wall rupture was recognised. A pulsion diverticulum due to variations in the thickness and strength of the cyst wall, a foreign body reaction against inner keratinous mass without obvious bacterial infection, and/or outer fibrous band(s) acting as constriction band(s), are proposed as possible causes of the 'sprouting'.
Surgical Division, Section of Plastic and Reconstructive Surgery, Ehime University Hospital, Ehime, Japan.
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Ohtsuka
D000328:Adult; D001132:Arm; D004814:Epidermal Cyst / Q000473:pathology* / Q000601:surgery; D005145:Face; D005260:Female; D005534:Foot Diseases / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012871:Skin Diseases / Q000473:pathology* / Q000601:surgery