Neuromuscular Choristoma of the Sciatic Nerve

Neuromuscular Choristomas are rare benign tumors characterized by their composition as well as their location. They are typically composed of mature skeletal muscle tissue elements that are intermixed with mature neural tissue elements. This condition is extremely rare as is noted by its prevalence. To date, only about forty cases of neuromuscular choristomas have been reported with only five specific to the sciatic nerve. Neuromuscular choristomas often present with progressive neuropathy, undergrowth of the affected limb, and limb length discrepancy. In the sciatic nerve (the most common location of NMC), this may also lead to specific manifestations in the distal limb, including progressive neuropathy, a shortened atrophic limb, dorsal contracture of the toes, and a cavovarus foot.