Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF Listen ++ For further information, see CMDT Part 24-30: Mononeuropathies + Key Features Download Section PDF Listen +++ ++ May occur in persons with diabetes mellitus or from compression by retroperitoneal neoplasms or hematomas May also result from pressure from the inguinal ligament when the thighs are markedly flexed and abducted, as in the lithotomy position The neuropathy may be asymptomatic, resolve rapidly and spontaneously, or become progressively more disabling + Clinical Findings Download Section PDF Listen +++ ++ Weakness and wasting of the quadriceps muscle Sensory impairment over the anteromedian aspect of the thigh and sometimes also of the leg to the medial malleolus Depressed or absent knee jerk + Diagnosis Download Section PDF Listen +++ ++ Electromyography and nerve conduction velocities are often indispensable for accurate localization of the focal lesion + Treatment Download Section PDF Listen +++ ++ Improvement may occur if any compression is relieved