“…MPMNs are usually asymptomatic and are normally detected incidentally during autopsy or examination of resected lung specimens obtained for other reasons [4], whereas diffuse pulmonary meningotheliomatosis may be associated with symptoms of diffuse interstitial lung disease [1,5]. Diffuse pulmonary meningotheliomatosis is less common [4,13]; these lesions tend to affect one or several lobes of the same lung [4,5,12] and can affect all the lobes of the lung, simulating metastatic disease, as in our case. Our patient also had cavitating nodules, which is a rare finding [1,12] and can erroneously suggest the presence of infection or granulomatous disease.…”