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Guide to Pediatric Urology and Surgery in Clinical Practice ( PDFDrive ).pdf
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168 A. Wakhlu

FIGURE 16.1.  External angular dermoid with punctum.

protruding intra cranially through a defect in the bone. Such cysts are less mobile than normal.

Clinically the dermoid presents as a mobile non tender swelling under the lateral end of the eyebrow, occasionally there is a punctum, signaled by deformity of a few eyebrow hairs (Fig. 16.1). X-ray of the skull and CT scan is necessary if intracranial protrusion is suspected.

16.2  Treatment of Angular Dermoid

The treatment of external angular dermoid is excision, with care to remove the whole lining of the cyst to prevent recurrence.This can usually be accomplished through a skin crease incision. For intracranial extension a craniotomy may be accomplished by lowering a frontal flap.

Pathologically angular dermoids contain sebaceous material with hair follicles and glandular epithelium. Recurrence is uncommon unless part of the lining has been left behind.