Scalp Epidermoid

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Done

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Epidermoid cysts

General

• Most cases are found in children younger than 3 years.

• If they protrude into the cranial cavity, they may be the source of cerebral symptoms.

• Are ectodermal rests or inclusions that may be located in the
• Scalp,
• Diploic spaces,
• Between the internal surface of the inner table and the dura.

Xray

• A small oval defect in the parietal bone with a sharply defined sclerotic border.
• The margin is due to flaring of the edge of the bone into a marginal ridge.

 

CT

• When epidermoid grow within the bone or impinge on it, they produce local destruction of bone that appears radiographically as a sharply demarcated lucency surrounded by a smooth sclerotic margin, which sometimes may be scalloped.

 

Natural history

• Epidermoids are usually benign and grow slowly

• The lesions usually disappear within a few years of discovery.

Surgery

• Indication
• Infected or at risk lesions
• Dermoid cysts that have a tract to the skin represent an infection risk.
• Cosmesis,
• To confirm histological diagnosis
• Lesion is painful when a patient lies down or combs their hair etc.