Gastric Adenomyoma: A Rare Entity Mimicking Pyloric Neoplasia—A Case Report

<b>Introduction:</b> Gastric adenomyoma is a rare benign lesion that may present with nonspecific gastrointestinal symptoms or be incidentally discovered. Due to its rarity and imaging resemblance to malignant tumors, it often leads to diagnostic and therapeutic dilemmas. <b>Methods:</b> A retrospective study was conducted, and a literature review was made to describe the background of the case found. <b>Case Report:</b> We report a case of a 50-year-old female who developed a gastric adenomyoma mimicking a pyloric lesion initially suspected to be malignant. Histopathological examination confirmed the diagnosis of gastric adenomyoma. The patient's postoperative course was uneventful, and she remains asymptomatic on follow-up. <b>Conclusions:</b> Gastric adenomyoma should be considered in the differential diagnosis of pyloric masses. Awareness of its imaging and histopathological characteristics can prevent unnecessary radical surgery.