Revista de otorrinolaringología y cirugía de cabeza y cuello
versión On-line ISSN 0718-4816
ELGUEZABAL R, Analía et al. Metastatic rectal adenocarcinoma to the external auditory canal: Case report and literature review. Rev. Otorrinolaringol. Cir. Cabeza Cuello [online]. 2010, vol.70, n.2, pp.153-158. ISSN 0718-4816. http://dx.doi.org/10.4067/S0718-48162010000200010.
Metastasis to the head and neck region are unusual. The most common site of receiving those metastasis is the temporal bone, a site which is usually affected by tumors that spread to the bones. However, metástasis to the external auditory canal are infrequent. Only a few cases have been published in the literature. We report the case of a 81 year-old man with pain, tinnitus and right otorrhea. The otomicroscopy showed a polypoid lesion in the right ear canal. The biopsy showed an atypical proliferation of epitelial cells forming anomalous glands, which were positive for citoqueratine 20 and carcinoembryonic antigen. He was diagnosed with metastatic adenocarcinoma of colon-rectum nine years previously Metastasis of colon adenocarcinomas to the external auditory canal are infrequent. Require a defferential diagnosis with metastatic adenocarcinomas of others locations but is always necessary to rule outprimary tumors. Among these, the most challenging diagnostic is with ceruminous adenocarcinomas.
Palabras clave : Colon metastases; External auditory canal; Ear tumors.