[Intravascular sclerosing bronchioloalveolar tumor and sclerosing hemangioma of the lung - differential diagnosis].

Confrontation of typical cases of an intravascular sclerosing bronchioloalveolar tumour and a pulmonary sclerosing "haemangioma" was used for making easier histological typing. Both shared a bit different papillary structure and fibrosis as well as hyalinization. The first one grew in multiple slowly increasing foci where granular pneumocytes occurred but in spaces of original alveoli around protruding tumorous papillae; the tumour cells proper were alike vasoforming elements. The second one was a solitary benign tumour consisting of granular pneumocytes in spite of some angiomatoid and cavernomatoid structures.