Kaposi s sarcoma a vascular malignant tumor

Tumors with tiny new blood vessels grow below the surface of the skin and in membranes of your mouth, nose, eyes, and anus. It can spread to your lungs, liver, stomach, intestines, and lymph nodes, which are glands that help you fight infection. It affects 8 times more men than women.

Kaposi s sarcoma a vascular malignant tumor

They are typically found on the skin, but spread elsewhere is common, especially the mouth, gastrointestinal tract and respiratory tract.

Kaposi s sarcoma a vascular malignant tumor

Growth can range from very slow to explosively fast, and is associated with significant mortality and morbidity. The lesions are usually as described above, but may occasionally be plaque -like often on the soles of the feet or even involved in skin breakdown with resulting fungating lesions.

Associated swelling may be from either local inflammation or lymphoedema obstruction of local lymphatic vessels by the lesion. Skin lesions may be quite disfiguring for the sufferer, and a cause of much psychosocial pathology. In the mouth, the hard palate is most frequently affected, followed by the gums.

Kaposi s sarcoma a vascular malignant tumor

Gastrointestinal tract[ edit ] Involvement can be common in those with transplant-related or AIDS-related KS, and it may occur in the absence of skin involvement.

Thus, kissing is a theoretical risk factor for transmission. Higher rates of transmission among gay and bisexual men have been attributed to "deep kissing" sexual partners with KSHV. Prudent advice is to use commercial lubricants when needed and avoid deep kissing with partners with KSHV infection or whose status is unknown.

KSHV is also transmissible via organ transplantation [17] and blood transfusion. Since Moritz Kaposi first described this cancer, the disease has been reported in five separate clinical settings, with different presentations, epidemiology, and prognoses. Classic Kaposi sarcoma most commonly appears early on the toes and soles as reddish, violaceous, or bluish-black macules and patches that spread and coalesce to form nodules or plaques.

In most cases the treatment involves surgical removal of the lesion. The condition tends to be indolent and chronic, affecting elderly men from the Mediterranean region, Arabian countries [20] or of Eastern European descent.

Although this may be present worldwide, it has been originally described later in young African people, mainly from sub-Saharan Africa.

This variant is not related to HIV infection [23] [24] and is a more aggressive disease that infiltrates the skin extensively.

The tumor arises either when an HHV 8-infected organ is transplanted into someone who has not been exposed to the virus or when the transplant recipient already harbors pre-existing HHV 8 infection.

In more advanced cases, they can be found in the stomach and intestines, the lymph nodes, and the lungs. Despite its name, in general it is not considered a true sarcoma[32] [33] which is a tumor arising from mesenchymal tissue. The histogenesis of KS remains controversial.

KS lesions contain tumor cells with a characteristic abnormal elongated shape, called spindle cells. The most typical feature of Kaposi sarcoma is the presence of spindle cells forming slits containing red blood cells. Mitotic activity is only moderate and pleomorphism is usually absent.

Inflammation around the tumor may produce swelling and pain. Variously sized PAS positive hyaline bodies are often seen in the cytoplasm or sometimes extracellularly. The spindle cells of Kaposi sarcoma differentiate toward endothelial cellsprobably of lymph vessel rather than blood vessel nature.

In differential diagnosis, arteriovenous malformationspyogenic granuloma and other vascular proliferations can be microscopically confused with KS. However, these tests are not available except as research tools, and, thus, there is little screening for persons at risk for becoming infected with KSHV, such as people following a transplant.

Treatment[ edit ] Kaposi sarcoma is not curable, but it can often be treatable for many years. In KS associated with immunodeficiency or immunosuppression, treating the cause of the immune system dysfunction can slow or stop the progression of KS.

People with a few local lesions can often be treated with local measures such as radiation therapy or cryosurgery. In general, more widespread disease, or disease affecting internal organs, is treated with systemic therapy with interferon alpha, liposomal anthracyclines such as liposomal doxorubicin or daunorubicinthalidomideor paclitaxel.

Likewise, no systematic screening of organ donations is in place. In people with AIDS, Kaposi sarcoma is considered an opportunistic infectiona disease that is able to gain a foothold in the body because the immune system has been weakened.

Because of their highly visible nature, external lesions are sometimes the presenting symptom of AIDS. Kaposi sarcoma entered the awareness of the general public with the release of the film Philadelphiain which the main character was fired after his employers found out he was HIV-positive due to visible lesions.

What Is Kaposi's Sarcoma? Its Symptoms, Causes, and Treatments

By the time KS lesions appear, it is likely that the immune system has already been severely weakened.The disease known as AIDS begins when the virus has seriously damaged a person's immune system, which means they can get certain types of infections (such as Kaposi sarcoma--associated herpesvirus, KSHV) or other medical complications, including KS.

Question: A patient presents complaining of severe pain and "burning" in an extremity. You note that the extremity is pale and cool to the touch, with mottled skin and without a palpable pulse.

Kaposi sarcoma treatment depends upon the type and can include curettage and desiccation, radiation therapy, surgery, and sometimes chemotherapy.

Get detailed information about the diagnosis and treatment of newly diagnosed and recurrent Kaposi sarcoma in this summary for clinicians. A sarcoma is a cancer that arises from transformed cells of mesenchymal (Connective Tissue) timberdesignmag.com, malignant tumors made of cancellous bone, cartilage, fat, muscle, vascular, or hematopoietic tissues are, by definition, considered sarcomas.

This is in contrast to a malignant tumor originating from epithelial cells, which are termed timberdesignmag.com sarcomas are quite rare. Kaposi sarcoma is an unusual vascular neoplasm that forms abnormal, slit-like vascular spaces containing compressed red cells (see Fig. B). Kaposi sarcoma was long recognized as an indolent tumor occurring on the lower extremities of elderly men of eastern Mediterranean origin.

Immunoreactivity of HHV-8 is a very helpful feature since Kaposi’s sarcoma is universally positive for this antigen, whereas other vascular tumors are negative, even those from HIV-infected patients.

Sarcoma - Wikipedia