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We present a case of congenital unilateral hypertrophy of an upper extremity due to aberrant muscles. Reviewing the previous Japanese reports, we discuss the clinical features and the pathogenetic factors of this rare anomaly. more...

Objectives: Muscle hypertrophy is a relatively rare condition that may cause nerve entrapment syndromes. We report the case of a 14-year-old girl with unilateral hypertrophy of the abductor hallucis muscle with entrapment of the medial plantar nerve and review the literature. Methods: Computed tomography and magnetic resonance imaging revealed unilateral hypertrophy of the abductor hallucis muscle. Results: Two injections of steroid and lidocaine at the point of tenderness resulted in resolution of the pain. Conclusions: We report a rare case of hypertrophy of the abductor hallucis muscle considered with entrapment of the medial plantar nerve. Treatment of this condition should be selected according to the pathological condition of each patient. more...