[Pressure-induced lipoatrophia semicircularis].

Lipoatrophia semicircularis of the thighs is an uncommon form of localized lipodystrophy characterized by horizontal semicircular depressions distributed to form a band. The asymptomatic, often bilateral, and symmetric lesions are localized on the anterolateral aspect of the thighs. The pathogenesis of these lesions is unknown, although most cases are associated with repetitive trauma. A new hypothesis has implicated electromagnetic fields produced by computers and their cables in modern buildings as a cause. We describe a case in a 28-year-old woman of lipoatrophia semicircularis that was related to wearing tight pants.