Pulmonar collision tumor: Metastatic adenoid cystic carcinoma and lung adenocarcinoma [Tumor pulmonar de colisão: Metástase de carcinoma adenóide cístico e adenocarcinoma pulmonar]

We report an extraordinary case of collision tumor consisting of a lung adenocarcinoma and a metastatic adenoid cystic carcinoma in a 56 year-old man. he was diagnosed with a pulmonary nodule 11 years after treatment of an adenoid cystic carcinoma of the right maxillary sinus. a non-small cell carcinoma was observed when a transbronchial biopsy was performed. the other component of the nodule was only diagnosed with pathological examination of the resection specimen. © 2010 sociedade portuguesa de pneumologia.