Abstract
1. A case of primary preural sarcoma and 4 cases of primary pulmonary carcinoma summarily reported.
2. Histological pictures morphologically corresponding to atypical adenocarcinoma were recognized in 2 cses of the so-called ademocarcinoma and 1 cases whice was interpreted as oatcell carcinoma.
3. The behaviors of metastaiic pulmonary carcinoma and the primary pulmonary carcinoma toward the surrounding pulmonary alvoli were observed. The metastatic carcinoma developed compressimely, but the primary carcinoma infiltratevely.
4. Pulmonary tuberculosis as the developing matrix or the inducing factor for pulmonary carcinoma was investigated, but no evidence of any clear relationship between them was obtained.
