Jablecki C K
Department of Neurosciences, University of California, San Diego.
Muscle Nerve. 1994 Mar;17(3):354-5. doi: 10.1002/mus.880170315.
Focal atrophy of a limb is usually caused by loss of muscle due to nerve or muscle disease. However, focal atrophy of subcutaneous tissues, an uncommon but well described entity, can mimic neuromuscular disease by producing a similar appearance of the limb. The clinical sign of thinness of the subcutaneous tissues (the "pinch-an-inch" test) suggests lipoatrophy as the cause of the limb asymmetry.
肢体的局灶性萎缩通常是由神经或肌肉疾病导致的肌肉丧失引起的。然而，皮下组织的局灶性萎缩是一种罕见但有充分描述的情况，它可以通过使肢体呈现相似外观来模仿神经肌肉疾病。皮下组织变薄的临床体征（“捏起一英寸”试验）提示脂肪萎缩是肢体不对称的原因。
