Plexiform Fibromyxoma of the Gastric Body: A Rare Benign Mesenchymal Tumor in an Unconventional Location

Plexiform fibromyxoma (PF) is an exceptionally rare benign mesenchymal tumor of the gastrointestinal tract, primarily affecting the gastric antrum. We present a detailed case report of a 67-year-old female patient who underwent diagnostic and therapeutic endoscopic procedures for a suspected gastrointestinal stromal tumor (GIST) initially identified during an upper endoscopy. Subsequent examination and pathology confirmed a diagnosis of PF in the gastric body following endoscopic mucosal resection. This report discusses the clinical presentation, diagnostic approach, histological findings, management strategies, and review of current literature on PF.