Unusual Intraluminal Processes of Capillaries in a Case of Undifferentiated Lung Cancer

Abstract

Extremely long villous processes projected from endothelium toward capillary canal was observed in the blood vessels of very malignant pulmonary carcinoma. Many of the villous processes appeared to be long enough to interconnect and to interwind each other, and some of them showed waving or rolling shape. There are numerous vesicles in various sizes within the capillary endothelium from which these processes are projected. A correlation between the rapid growth of lung cancer and these unusual findings is not known at present.