[Immunohistochemical findings in intrathoracic tumors. II. Demonstration of alpha 1-antitrypsin in tumor tissue].

Immunohistological investigations for demonstration of alpha 1-antitrypsin were undertaken in different intrathoracic tumors. 60% of them showed deposits of alpha 1-antitrypsin in tumor tissue. Among different histological types, bronchial carcinomas showed the highest percentage of positive findings (= 75%). Negative findings were observed in carcinoid tumors and different neurogenic tumors.