该患者为17岁高中生,临床表现为包皮狭窄环,且包皮分布不均:背侧(上半圈)皮量显著多于腹侧(下半圈)。手术切口设计原则如下:(1)彻底切除狭窄环;(2)保留长度适中的包皮内���;(3)完整保留包皮系带;(4)将部分腹侧内板转移用于系带延长术,以弥补腹侧皮肤量之不足。The patient, a 17-year-old student, suffers from a tight preputial ring with an uneven skin distribution—specifically, more skin on the top (dorsal) than the bottom (ventral). To ensure the best functional result, the surgery aims to: (1) fully remove the tight constriction; (2) keep just the right amount of inner foreskin; (3) protect the sensitive frenulum; and (4) use some of the inner ventral skin to lengthen the frenulum, ensuring there is enough skin coverage on the underside.