A tumor that usually presents with small nodules or small sessile polyps, predominantly in the distal esophagus. Histologically, it is composed of sheets of oval to polygonal cells with a small central nucleus and abundant granular cytoplasm. This is usually a benign tumor. (WHO, 2000) -- 2003. The disease is MONDO_0003251 (esophageal granular cell tumor). Also known as: esophageal granular cell myoblastoma, esophageal granular cell neoplasm, esophagus granular cell tumor, granular cell esophageal tumor, granular cell esophageal tumour, granular cell esophagus myoblastoma, granular cell esophagus neoplasm, granular cell esophagus tumor.