Abstract
The patient was a 62-year-old male. He visited our hospital after having undergone an operation and radiation due to esophageal cancer in 1998 and a total laryngectomy due to laryngeal carcinoma in 2001. He visited our hospital on February 13 in 2006 and was operated by endoscope on February 22 just over one week later. Pathologically, the condition was diagnosed as a carcinoma in situ. Overlapping head and neck carcinomas are frequent from the standpoint of field cancerization, so it is not uncommon that hypopharyngeal carcinoma occurs after laryngectomy. Squamous cell carcinomas occurring after laryngectomy or radiotherapy are often treated as local recurrent or radiation induced carcinomas, but we believe that they include overlapping carcinomas.
