Herane María Isabel, Urbina Francisco, Sudy Emilio
Cátedra de Dermatología, Escuela de Medicina, Universidad Andrés Bello, Santiago de Chile, Chile.
J Dermatol. 2007 Jun;34(6):390-3. doi: 10.1111/j.1346-8138.2007.00295.x.
Lipoatrophia semicircularis is an infrequent condition characterized by semicircular depressions of the anterolateral aspects of the thighs. The origin of this peculiar variant of lipoatrophy is unknown, although repeated mechanical trauma on the affected thighs has been advocated in many cases. A 57-year-old woman presented with a 1-year history of two bilateral, parallel, symmetric, asymptomatic depressions on the anterolateral aspect of her thighs. The patient worked as a cashier, permanently seated and almost always wearing trousers. The localization of lesions and their linear artifactual appearance perfectly matched with the strangling folds formed by trousers while being sat. Echotomographic examination revealed a loss of the normal echogenic pattern in the subcutaneous tissue of the affected areas. We believe that the anatomical adipose constitution of women's thighs predisposes that a persistent mechanical pressure induced by wearing trousers while being sat for long periods of time, originates a relative impaired circulation on a tenuous perfused tissue, and induces the development of lipoatrophia semicircularis.
半圆形脂肪萎缩是一种罕见的病症，其特征为大腿前外侧出现半圆形凹陷。尽管在许多病例中有人主张是患侧大腿反复受到机械性创伤，但这种特殊类型脂肪萎缩的病因尚不清楚。一名57岁女性，其大腿前外侧有双侧、平行、对称、无症状的凹陷，病程1年。该患者为收银员，长期坐着且几乎总是穿着裤子。病变的位置及其线性伪影外观与坐着时裤子形成的勒痕完全相符。超声检查显示，患区皮下组织正常回声模式消失。我们认为，女性大腿的解剖学脂肪构成使她们在长时间坐着时穿着裤子所产生的持续机械压力，导致在灌注不足的组织中出现相对的循环受损，并引发半圆形脂肪萎缩。
