ESOPHAGEAL SQUAMOUS-CELL PAPILLOMA, SUSPECTED OF SQUAMOUS-CELL CARCINOMA

A 46-year-old male without any subjective complaints was diagnosed by radiography as having one polypoid lesion at the distal esophagus. End oscopy indicated a semipedunculated polyp about 1 cm in size, the spec imens of which included atypical cells with a high N/C ratio in the su bmucosa. Squamous cell carcinoma of the esophagus was suspected. Cytol ogical studies of PAS, CEA and keratin staining to atypical cells were all negative, with Lugol solution staining of the tumor. After polype ctomy the lesion was diagnosed as a squamous cell papilloma of the eso phagus; and the atypical cells were determined to be immature fibrobla sts and/or endothelium.