[Hyalinizing intravascular bronchioloalveolar tumor--a rare form of diffuse lung lesions]

A rare, badly known diffuse pulmonary lesion--multifocal hyalinizing intravascular "bronchiolo-alveolar" tumour in a woman of 22, is described. The lesion was revealed at fluorography, diagnosed by means of mediastinopleuroscopy, in lung biopsy; there were no clinical manifestations. A hyalinized compact and branching node, poor in cells, intruding at the periphery into the alveolar septa in the form of micropolyps was found histologically.