Neoplasm is the term meaning new growth of tumor.
The term for new formation of blood vessels is angiogenesis.
A hemangioma is the medical term meaning tumor of blood vessels.
Narrowing of the blood vessels is called atherosclerosis.
Avascular is the medical term meaning without blood vessels.
Neoplasm is the medical term meaning tumor; a neoplasm can be malignant (cancerous) or benign.
vascular
The smallest blood vessels are the capillaries.
Blood vessels
Vasculitis
Fluorescein angiography is the medical term meaning radiographic study of the blood vessels of the retina. This process can examine retinal vessels in the case of diabetes.
plaque
Angioblast