[Lung carcinosarcoma]

Lung carcinoma in a 72-year-old man smoker is described. Tumour, 12x8x8 sm in size, was located in the middle lobe of the right lung. Metastases were in the regional lymph nodes, soft tissue of the anterior abdominal wall, gastric mucosa and left adrenal. Epithelial component had signs of the undifferentiated carcinoma and adenocarcinoma, mesenchymal component consisted of leiomyosarcoma. Electron-microscopically, tumour cells with squamous, glandular, smooth muscle and fibroblastic features were found.