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