[Cancers associated with cancer of the esophagus].

Secondary neoplastic localisations observed in oesophageal epidermoid carcinoma are essentially in the upper oesophagogastric tract, in particular the hypopharynx, the oropharynx and the buccal cavity. The associated morbidity of the mucous membrane of the upper oesophagogastric tract and that of the oesophagus, with regard to the risk of developing epidermoid carcinoma, is linked to a common risk factor, simultaneous alcohol and tobacco intoxication. The high frequency of these secondary localisations, which can be synchronous or metachronous, suggests they should be routinely sought during pretreatment evaluation of oesophageal cancer as well as during mid- and long-term follow up.