An 80-year-old man underwent esophagogastroendoscopy, which revealed a white flat-elevated lesion (5 mm) with a reddish depression in the center and was diagnosed with superficial esophageal cancer. The lesion resembled a submucosal tumor, and deep submucosal invasive cancer was suspected. We performed endoscopic submucosal dissection, and histopathological evaluation of the resected specimen showed intramucosal basaloid carcinoma. BSC usually shows poor prognosis; however, curative resection was achieved owing to early detection in our patient. Retrospective review of previous endoscopic findings showed the lesion in images obtained six months prior to presentation; however, the changes in the lesion were scarce. This case report highlights changes in the initial findings of Basaloid carcinoma over time, which will benefit clinicians in routine practice.
