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see skin cancerskin cancer,
malignant tumor of the skin. The most common types of skin cancer are basal cell carcinoma, squamous cell carcinoma, and melanoma. Rarer forms include mycosis fungoides (a type of lymphoma) and Kaposi's sarcoma.
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melanoblastoma; a malignant tumor that consists of melanin-producing cells.

Factors conducive to the development of melanomas include injury and hormonal stimulation, especially during puberty. Melanomas generally occur on the skin; less often, they appear on the retina, pia mater, nasopharynx, larynx, esophagus, and mucosa of the intestine and other organs. Melanomas usually develop at the site of pigmented or depigmented birthmarks, but they may also appear elsewhere. The process starts with a barely perceptible, painless tumor on the skin, sometimes resembling a wart, which gradually becomes dark brown or black. Occasionally, it ulcerates and bleeds. In case of injury, the tumor may enlarge quickly and become tuberous, dense at the base, and stiffer. The regional lymph nodes enlarge. The initial signs that a melanoma is developing at the site of a birthmark are the birthmark’s enlargement, an intensification or reduction in its pigmentation, and the appearance of a red rim around it. Treatment involves prompt surgical intervention, based on early diagnosis, and the use of radiotherapy and drugs to retard the growth and reproduction of the cells.



A malignant tumor composed of anaplastic melanocytes.
A benign or malignant tumor composed of melanocytes.


Pathol a malignant tumour composed of melanocytes, occurring esp in the skin, often as a result of excessive exposure to sunlight
References in periodicals archive ?
Primary malignant melanoma of the bladder is very rarely seen and accounts for 0.
The aim is to raise awareness of the early signs of cancer - including malignant melanoma - because the earlier it is diagnosed, the better the chance people have of beating the disease.
A malignant melanoma was reported in the left patagium of a budgerigar (Melopsittacus undulatus).
Glenn Alto, Pharmalucence President and CEO stated, "We are very pleased to receive this new FDA approval for the use of SCI in malignant melanoma patients.
The primary testicular tumour is known to be a disease of young men in their 20s and 30s, but the presentation of testicular metastasis of malignant melanoma varied widely between 43 to 80 years.
The incidence of malignant melanoma is rising rapidly, resulting in an increasing drug-treated population," said Marcus Hoyle, analyst at Decision Resources.
As a single agent, MEK inhibitor binimetinib is set to launch for NRAS-mutation-positive malignant melanoma, carving itself a niche in the malignant melanoma market.
5 years, during which 2,904 cases of malignant melanoma were diagnosed.
Cancer Research UK said people over 65 are around seven times more likely to develop malignant melanoma compared to 40 years ago.
Malignant melanoma is a tumour which usually involves skin melanocytes, and rarely uveal cells and mucous membranes.
TANNING has led to skin cancer soaring by 36,000 cases in five years and malignant melanoma is now the fastest growing type of cancer in young people.
Malignant melanoma may spread to all organs, like skin, lungs, distant lymph nodes, pleura, liver, central nervous system, skeleton, subcutaneous sites, gastrointestinal tract, heart, adrenal glands, kidney, and thyroid gland, with different frequencies (2).

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