目的:探讨肾包膜下积液的成因和治疗方法。方法:回顾分析23例肾包膜下积液的临床资料。结果:本组23例中,除1例因肿瘤致尿路梗阻放弃治疗,余均经治疗后肾包膜下积液治愈。结论:肾包膜下积液病因以梗阻性为多见,解除梗阻后可治愈;原因不明的特发性肾包膜下积液,肾包膜下穿刺引流术因创伤小,是首选方法,对穿刺引流术治疗后复发病例,可选择手术治疗。 Objective: To explore the causes of renal subcapsular effusion and treatment. Methods: A retrospective analysis of 23 cases of renal capsule fluid clinical data. Results: The group of 23 cases, except 1 case of urinary tract obstruction caused by tumor to give up treatment, and more were treated by subrenal fluid cure. Conclusions: The cause of subcapsular effusion is obstructive, which can be cured after the obstruction is obstructed. The idiopathic subrenal edema and unexplained puncture and drainage under the renal capsule are the first choice because of the small trauma. Puncture and drainage after treatment of recurrent cases, surgery can choose.