Perineurioma of the sciatic nerve: a possible cause of idiopathic foot drop in children: report of 4 cases.

The authors report on a loss of foot dorsiflexion in pediatric-age individuals and suggest that the possible cause could be a perineurioma of the sciatic nerve. The authors describe 4 cases in which foot drop in the absence of sensory discomfort was the heralding sign of perineurioma of the sciatic nerve. Magnetic resonance imaging showed a focal enlargement of the sciatic nerve, but the tumor was confined only to its lateral compartment.