例1　男,27岁,工人。阴囊发生黄色结节4～5年,可破溃流出奶油状粘物,无外伤史,其父阴囊有类似皮损。体检:阴囊密布20多个米粒至花生粒大小半球状较软结节,色黄,表面光滑,无压痛,无破溃(照片11)。血钙磷正常。临床诊断:多发性皮脂囊肿。病理活检示复层鳞状上皮,表皮中央变薄,边? Example 1 Male, 27 years old, worker. Scrotal yellow nodules occur 4 to 5 years, can be ruptured creamy sticky material, no history of trauma, his father had a similar scrotal lesions. Physical examination: The scrotum is densely covered with more than 20 grains to the peanut-sized hemispherical soft nodules. The color is yellow, the surface is smooth, no tenderness and no ulceration (Photo 11). Blood calcium and phosphorus normal. Clinical diagnosis: multiple sebaceous cysts. Biopsy showed stratified squamous epithelium, the central thinning, while?