Although invasive carcinoma of the esophagus should theoretically begin as an in situ process, the latter is rarely seen in clinical practice. Two cases of carcinoma in situ of the esophagus were diagnosed at our institution.
(JAMA 239:335-336, 1978)
Sotus PC, Majmudar B, Symbas PN. Carcinoma In Situ of the Esophagus. JAMA. 1978;239(4):335-336. doi:10.1001/jama.1978.03280310067023