Melanoma
is tumor of the skin which cancerous (malignant). It grows from the
melanocytes – the cells that color and tan the skin. Melanoma is
also called cutaneous melanoma or malignant melanoma. The incidence
of melanoma is increasing worldwide at a rate of about 5% per year.
It is a more
serious problem than the more common skin cancers, basal cell cancer
or squamous cell cancer. Unlike these cancers, melanoma often will
spread (metastasize) to other parts of the body through. About 41,600 patients will be diagnosed with melanoma in 1998, and
7300 will die from recurrent, metastatic disease. Melanoma can spread
by local extension (through lymphatics) and/or by hematogenous routes
(through the bloodstream) to distant sites. The risk of relapse may
decrease over time, but late relapses are not uncommon.
Melanoma can also appear on the body as a new mole, or one that has
changed in the size, shape, feeling or color or developed oozing or
bleeding. Adult men most often get melanoma on the trunk, especially
between the shoulder blades, or on the head or neck; women most often
get melanoma on the arms and legs. It can rarely form in a mole or in
children.
Most melanomas are dark, but some are not, and may be flesh colored
or pink to red, If there is a serious question of skin cancer, the
mole or pigmented area will be cut it out (local excision). This is
usually done in a doctor's office. It is important that this remove
the entire mole if possible.
The lab will analyze the removed skin. If melanoma is found they
will report how deep and aggressive it appears. Then physical exam and
lab tests will be done to look for signs cancer cells have spread to
other parts of the body. This is called staging. A doctor needs to
know the stage of the disease to plan treatment.
In the earliest melanomas, the abnormal cells are found only in the
outer layer of skin cells and do not invade the body. It is more
advanced if the growth goes deeper than 4 millimeters (less than 1/6
of an inch) into the skin. Most melanomas fall between these two
extremes.
More serious still are melanomas that have spread to the body
tissue below the skin, show additional tumor around original tumor
(satellite tumors), or have spread to lymph nodes or other organs (
In patients with
Surgery is the primary treatment of all stages of melanoma. A
second procedure is normally done to ensure complete removal of the
melanoma. Complete removal of all the melanoma before it has spread is
the only sure cure for melanoma. Usually, the biopsy site and a rim of
apparently normal skin are removed. This is called a re-excision. The
amount removed depends on how deep the melanoma is. Skin may have to
be taken from another area of the body and put (or
"grafted") where the cancer has been taken out.
Chemotherapy uses drugs to kill cancer cells. However, chemotherapy
has not been shown to be very effective in treating melanoma. Clinical
studies are being done to find chemotherapy drugs that are more
effective. You may consider participation in one of these.
Radiation uses x-rays to kill cancer cells and shrink tumors.
Radiation shrinks and slows, but does not usually cure, melanoma. Some
melanoma tumors need special types of radiation that is not available
locally.
Treatment of advanced (stage III) melanoma
may involve surgical removal of the tumors and any affected lymph
nodes, followed by systemic or local chemotherapy with single or
multiple agents. The five-year survival rate for treated Stage III
patients is about 60 percent, and quality of life is often compromised
by both the disease and the treatment. A new treatment is Allovectin-7,
which uses a lipid-DNA complex to help the immune system recognize and
attack cancer cells.
Melanoma vaccines are the most promising new treatment for advanced
melanoma. These try and teach the body to fight the cancer.
Different centers make their own vaccine different ways, Some seem to
work better than others, but results are still inconclusive. 15-20% of
patients receiving melanoma vaccines experience partial or complete
regression of metastases. Patients who react to the vaccine
therapy have significantly longer survival. However, no one has yet
demonstrated an unequivocal survival benefit for melanoma so it is
still experimental.
Good information at:
http://www.stopmelanoma.com/
http://www.mpip.org/