Perineurioma of scalp in an infant
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Perineuriomas are uncommon benign peripheral nerve sheath tumors exclusively composed of well-differentiated neoplastic perineurial cells.They are classified into two main types: intraneural and extraneural (soft-tissue). Intraneural perineuriomas are restricted to major peripheral nerve boundaries, while extraneural perineuriomas are found mainly in soft tissues and skin and usually have no connection to peripheral nerves.

Extraneural perineurioma usually present as a small, well circumscribed, firm and painless mass. They mainly affect adults and few cases have been described in children, but are very rare in infants. It occurs most commonly in the soft tissue of the extremities and the trunk, infrequently in other locations. We report a case of extraneural (soft-tissue) perineurioma occurring on the scalp of a 3-month-old infant.

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