see Meralgia Paresthetica.

It was first described independently by Roth 1). and Bernhardt in 1895 2).

1)
Roth: Meralgia Pareathetica, Berlin, S. Karger, 1895.
2)
Bernhardt Ueber isollert Gibiete des Nervua cutaneua femoris externua vorkommende paraeathealen, Neurot. Centraibl 242, 1895.