A muscular lesion suggestive of focal myositis in a child with Proteus syndrome.

[focal myositis]

Proteus syndrome is a polymorphic hamartomatous disorder associated with a broad spectrum of rare congenital malformations . Many neoplasms have been linked to this condition , including lipomas , lymphangiomas , and hemangiomas . The authors describe a case of a congenital muscular lesion in a child with Proteus syndrome . This mass was painless but was growing out of proportion to her leg musculature . A magnetic resonance imaging scan and incisional biopsy showed findings consistent with focal myositis . The clinical , radiographic , and histologic characteristics of this previously undescribed lesion are discussed , with a brief review of the literature .