Posterior femoral cutaneous nerve mononeuropathy: a case report.

Isolated posterior femoral cutaneous nerve (PFCN) lesions are rare, with only six cases reported in the modern literature and one case documented with a nerve conduction study. A 25-year-old woman had sensory loss in the posterolateral thigh after two right gluteal intramuscular injections. Nerve conduction studies using Dumitru's technique showed a 9microV response on the asymptomatic side, but no response on the symptomatic side, and no abnormalities on needle examination of the back and lower extremities. Although a single case does not prove the validity of a technique, this case provides the rare opportunity to demonstrate the utility of Dumitru's technique.