The inner surface of the blood and lymph vessels lined with endothelium. Endothelial cells mostly flattened, stretched along the length of the vessel, with one, two, less three cores. Settle basement membrane, well regenerated.

Gemangioma

Gemangioma - A benign tumor, develops from blood vessels. Cytological diagnosis is almost impossible, as in punctate tumor is usually found only blood.

Gemangioэndotelioma – Angiosarkoma

Malignant tumors of blood vessels - gemangioэndotelioma, or angiosarcoma, It is developing very rarely, localized most often on the limbs.

Microscopic angiosarcoma meets cell round, Spindle or polymorphonuclear cell sarcoma. The tumor contains a large number of vessels, closely related cells. In cytological preparations revealed a lot of medium-sized cells, round, oval or spindle-shaped. Cores, located in the center, big, gently stained, hypertrophied nucleoli. Chromatin uniformly fine. The contours of the nuclei clear, smooth.

When cell round variant sarcoma cytoplasm may be narrow, subtle or absent.

When spindle cell sarcoma variant - Cytoplasm elongated at the poles or missing.

When polymorphocellular embodiment sarcoma - Rather abundant cytoplasm. Painted in light blue tones.

Cells are arranged in the form of fragmented clusters, sometimes form rozetkopodobnye structure. In preparations, especially under low magnification, found fragments or clusters of capillaries between the cells and out of them. If a lot of capillaries, they are arranged in parallel rows.

Around the capillaries can accumulate in the form of coupling sarcomatous cells.