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[Early esophageal cancer concomitant with leiomyoma of the esophagus--a case report].

Benign esophageal tumors concomitant with esophageal cancer are sometimes observed, however, it is rare that esophageal cancer is associated at the surface of the leiomyoma as a submucosal tumor. We report a 59-year-old man with a polypoid esophageal cancer. The polypoid tumor, 0.6 X 0.7 X 1.3 cm in size, was removed in 1976; histological findings showed that a large amount of the tumor was leiomyoma and that squamous cell cancer was associated at the surface of the leiomyoma. After polypectomy, he experienced recurrence and radical surgery was performed in 1981; histologically, the resected specimen showed early esophageal cancer.