label: Type I Pleuropulmonary Blastoma
label_lc: type i pleuropulmonary blastoma
description: A subtype of pleuropulmonary blastoma characterized by the presence of cysts with a microscopic population of primitive malignant small cells. There is no evidence of a malignant solid mesenchymal component. It usually has a good prognosis compared to types II and III pleuropulmonary blastoma.