肛周颗粒细胞瘤误诊为肛瘘1例并文献复习OA

Perianal granular cell tumor is a rare neurogenic soft tissue tumor with a predominantly benign course,insidious growth,and atypical symptoms,making it highly susceptible to misdiagnosis as a common perianal infectious disease.This article reports diagnosis and treatment process of a patient with perianal granular cell tumor misdiagnosed as anal fistula.The patient presented with recurrent perianal dull pain,local induration,and intermittent slight exudation,without obvious redness,swelling,heat,pain,or signs of acute infection.Based on perianal examination and clinical experience,a preliminary diagnosis of simple anal fistula was made.Intraoperative exploration revealed no typical cord-like sinus tract structure of anal fistula,and the local lesion tissue was completely removed and sent for pathological examination.The final diagnosis was perianal granular cell tumor.This article details the clinical data,diagnostic process,treatment strategy,and prognosis of this case,and reviews the relevant literature to discuss the morphological characteristics,differential diagnostic points,and treatment strategies for perianal granular cell tumors,with the aim of reducing the clinical misdiagnosis rate and improving patient outcomes.