area on the affected thigh remained numb with no pain or paresthesia, and no motor symptoms or mobility issues. However, neither of these was present in this patient. Nerve conduction studies (NCS) were normal as well (see above), including unremarkable lateral femoral cutaneous sensory nerve action potentials (SNAP).Ī previous study using inguinal segmental and distal sensory NCS in 34 patients with meralgia paresthetica reported absent lateral femoral cutaneous sensory responses in 32% of patients and delayed conduction across the inguinal ligament in 45% of patients. Basic metabolic and inflammatory labs were unremarkable. 1), a negative straight leg raise, preserved proximal and distal motor strength, and normal reflexes. Physical exam revealed decreased pinprick sensation in the anterior right thigh which the patient outlined with a marker (Fig. The only major recent change prior to the symptom was administration of the vaccine. The medical team confirmed there was no history of diabetes, tight prolonged use of belts, or large objects in the pocket and he had not been carrying heavy objects using support from the thigh or groin. The patient said he was continuing to ambulate without an issue and also denied excessive supine or lateral decubitus positioning. He also denied ever having TB, falls, head strike, or issues with joint space perception. He denied dry eyes or mouth, prior chemotherapy, vitamin B6 supplementation, weight loss, night sweats, double vision, speech problems, facial asymmetry, back pain, or manipulation. There was no involvement of the face or any other extremity, and no history of shingles, CMV, B12 deficiency, stroke, multiple sclerosis, syphilis, DM2, HIV, Lyme, ETOH abuse, and uremia. There was no weakness, paresthesia, or pain and the rest of his neurologic exam was unremarkable. The patient then presented to an outpatient neurology clinic affiliated with a large academic medical center where his exam was notable for much decreased pinprick sensation of the unilateral right anterior thigh numbness in a lateral femoral cutaneous nerve distribution (Fig.
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