Benign Tumors of Blood Vessels

Hemangiomas (angiomas) are

benign proliferations of blood vessels that resemble a mass

Spindle cells form small vascular spaces with

hemosiderin-laden macrophages and red blood cells

Kaposi's Sarcoma has a strong association with the following virus

herpes simplex-8 virus

Where are Glomus Cells found?

in specialized arteriovenous anastomoses

Where do Hemangiomas occur

* anywhere in the body * typically the skin and subcutaneous tissue

Kaposi's Sarcoma appearance is

* cutaneous lesions * red/purple/dark blue macules, plaques, raised nodules

Glomus tumors are found in

* finger and toes * under nails

Where do Hemangioendothelioma occur

* individually * in groups * in the lining of congeries of vessels

Who is affected by Kaposi's Sarcoma?

* males over age of 60 * Ashkenazic Jews * AIDS patients

Hemangiosarcoma are

* poorly differentiated (anaplastic) * rapidly growing * infiltrating tumor invading skin, musculoskeletal system, breast and liver

Caverous hemangiomas appearance is

* red blue spongy lesions * sharply defined margins

Caverous hemangiomas can be found on

* skin * liver * pancreas * spleen * brain

Where do Capillary hemangiomas occur

* skin and subcutaneous tissue * lips * liver * spleen * kidneys

Caverous hemangiomas have a higher occurrence in patients with this disease

Von Hippel-Lindau disease

Glomus Tumors are

bengin neoplasms composed of glomus cells

Hemangioendothelioma in children are

benign

Capillary hemangiomas are

capillary structures that proliferate and become closely packed and intertwined

Hemangiomas are considered a

congenital anomaly

When are Hemangiomas most common?

during infancy

Caverous hemangiomas are

large vascular spaces that are filled with blood

Hemangioendothelioma in elderly are

malignant and develop into hemangiosarcoma (angiosarcoma)

Hemangioendothelioma are

neoplasms of blood vessels composed of endothelial cells

Kaposi's Sarcoma is an

opportunistic (occurring in immunosuppressed individuals), multifocal, malignant neoplasm of the vasculature of the skin, lymph nodes or viscera

Capillary hemangiomas color is

red to blue

The appearance of glomus tumors is

small purple nodules which can be very tender and painful

Kaposi's Sarcoma is a collection of

spindle cells (specialized muscle cells)

Glomus Cells are involved in

thermoregulations that occur in nodular masses in the skin