Endobronchial metastases of anal canal carcinoma.

Abstract Endobronchial metastases (EBM) secondary to extrapulmonary primary tumors are rare. The most common solid malignant tumors associated with EBM are breast, renal and colorectal carcinomas. This case report describes the first documented case of EBM from anal canal carcinoma. This neoplasm constitutes less than 1% of colorectal tumors. The clinical presentation of this entity is variable, being asymptomatic in more than 50% of cases. Generally, EBM are diagnosed in advanced stages and the survival after the diagnosis is poor. It is therefore an exceptional clinical manifestation in which bronchoscopy has an important role in the diagnosis and the treatment.