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Alternative namesDermoid cyst - malignant; Nonseminomatous germ cell tumor - teratoma; Immature teratoma
DefinitionMalignant teratoma is a type of cancer consisting of cysts that contain one or more of the three main types of cells present in embryos -- ectoderm, mesoderm, and endoderm cells.
Causes, incidence, and risk factors
Malignant teratoma occurs most often in young men in their 20's - 30's. It is often located in the anterior mediastinum (in the chest). Most malignant teratomas have spread (metastasized) by the time of diagnosis and they can spread throughout the body.
A number of other cancers are often associated with these tumors including:
Symptoms result from spread of the tumor into surrounding tissues and include:
Signs and tests
On physical examination, a physician may see signs of congestive heart failure and increased pressure in the chest cavity. Diagnosis is made using the following tests:
Because malignant teratomas have often spread by the time of diagnosis, anticancer chemotherapy is usually needed. Cisplatin, etoposide, and bleomycin are commonly used as a combination of chemotherapy.
After chemotherapy is complete, CT scans are repeated. If there is a residual mass in the area of the tumor, surgery is recommended because of the possibility that the cancer will grow back in that area.
There are many support groups available for people with cancer. Contact the American Cancer Society or search the Internet to find one near you. Research has shown that women with breast cancer survive longer if they participate in a support group and the same may be true for other cancers.
Expectations (prognosis)The prognosis for people with malignant teratomas is based on the size of the tumor, its location, and the age of the patient. In young patients, less than 15 years of age, teratomas are more likely to be benign. For adults, complete remission is possible in 50-70% of patients and long-term survival is seen in about 42%.
The cancer can spread throughout the body and there may be complications of surgery or related to chemotherapy.
Calling your health care providerCall your health care provider if you have symptoms suggestive of malignant teratoma.
Update Date: 8/8/2002Scott Howard, M.D., M.S., Memphis, TN. Review provided by VeriMed Healthcare Network.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT