患者男，２５岁。因双侧大腿皮疹４年余，泛发全身２年，于１９９６年５月来我院门诊。患者１９８９年夏在右大腿伸侧出现红色皮疹，米粒至绿豆大，高出皮面，逐渐扩大成环状，中央留下灰褐色色素沉着，边缘又向外围扩展，未予治疗，数月后自行消退。无自觉症状。１９９１... Male patient, 25 years old. Due to bilateral thigh rash more than 4 years, generalized body 2 years, in May 1996 to our hospital. In the summer of 1989, the patient showed a red rash on the extensor side of the right thigh. The rice grains were large to the mung bean and were larger than the leather surface. They gradually expanded into rings and the center left a taupe pigmentation. The periphery expanded to the periphery and was not treated. Resolve on their own. No symptoms. 1991 ...