Diffuse pulmonary meningothelial like nodules simulating metastatic thymoma

Diffuse pulmonary meningotheliomatosis (DPM) is a parenchymal lung disease characterized by disseminated bilateral minute pulmonary meningothelial-like nodules (MPMNs). These meningothelial-like nodules are classically encountered as benign solitary or multiple pulmonary nodules containing small epithelioid cell collections nestled within normal pulmonary parenchyma