[Nasal polyposis masquerading epidermoid carcinoma of the maxillary sinus. Importance of the biopsy in FENS].

Sinonasal polyposis sometimes can masquerade malignant pathology of the paranasal sinuses and nose. We report the case of a 60 years old male diagnosed initially as solitary polyp and operated by endoscopic surgery with intrasurgical biopsy because a suspect of malignancy. The result was epidermoid carcinoma from left maxillary sinus that was confirmed after the definitive anatomopathologic exam. After Caldwell-Luc and complete removal of the tumoration, the patient evolutioned satisfactory being free of illness by clinical and radiological explorations after 1 year follow-up.