Abstract

A pathologically proved case of carcinosarcoma of the left lung(mixed form), in a 58-year-old, is reported, with discussion of the histopathological features of this case, along with a review on histogenesis of the carcinosarcoma of the lung. The carcinosarcoma is composed of squamous epithelial and mesenchymal components, both of which revealed malignant histological evidence. The stromal components are unique in that disclosed cartwheel whorl pattern, along with the resemblance to the malignant fibrous histiocytoma. The stroma also showed oteoid matrix, in areas. This is the second case of the carcinosarcoma reported in Korea.