Doespositive tinel's sign over the area of anterior femoral cutaneous nerve in a patient w sympt of meralgia paresthetica r/o ms? must be periph yes?

Accuracy: To reasonable r/o ms you should have an MRI brain or lumbar puncture with the appropriate labs performed.

Probably : I think jumping to the assumption of ms just because of paresthesias in the anterolateral thigh is a little over reaching. Meralgia paresthetica is fairly classic. Can try electrodiagnostic testing, but that nerve is very difficult to get in even average sized patients. I would personally try Prednisone for a week, Gabapentin or lyrica, (pregabalin) and avoiding possible causes (tight belts) and wt reduction.

Agree : The Tinel's is merely a sign of chronicity, and would support a diagnosis of pathology over distribution of lateral femoral cutaneous nerve of the thigh. This is in no way associated with MS other than possibly a co-morbidity. So, would agree with your assumption and the other opinions voiced. This is an isolated peripheral mono-neuropathy.