Intimal Sarcoma

**Semantic type:** Neoplastic Process

**Definition:** A malignant neoplasm arising from the large blood vessels. It is characterized by the presence of tumor cells that grow within the lumen of the blood vessels. The intraluminal tumor growth may result in vascular obstruction and spread of tumor emboli to peripheral organs. The prognosis is usually poor.

**Synonyms:** - Intimal sarcoma