melanoma

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melanoma:

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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Melanoma

 

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.

I. IA. SHAKHTMEISTER

melanoma

[mel·ə′nō·mə]
(medicine)
A malignant tumor composed of anaplastic melanocytes.
A benign or malignant tumor composed of melanocytes.

melanoma

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 ?
The company said Nevisense is a tool to detect malignant melanoma directly on the skin.
Metastatic or Stage IV malignant melanoma is a devastating disease and is defined by dissemination of the cutaneous tumor to other organs or non-regional lymph nodes.
The latest data from the National Cancer Intelligence Network shows that just 56% of malignant melanomas were diagnosed in secondary care following a two week referral for suspected cancer in 20134.
Purchase a copy of this Global Malignant Melanoma Market With Focus on Nevisense System: 2015-2020 report at http://www.
It's worrying to see that malignant melanoma rates are continuing to rise and it's very important that people take care of their skin in strong sun, even if they've been sunburnt in the past.
Malignant melanoma metastatic to the gastrointestinal tract is usually a late manifestation of the disease with an overall poor prognosis.
Retired teacher Sue Deans, 70, was first diagnosed with malignant melanoma in 2000 and in 2007 was told the cancer had come back.
Editor's Note: The decrease in the risk of melanoma by coffee drinking was observed only in association with caffeinated coffee and was restricted to those with malignant melanoma as opposed to melanoma in situ.
IHC examination showed strong cytoplasmic positivity with HMB45,x200, confirming malignant melanoma metastasis (Fig.
Role of nuclear medicine in the management of cutaneous malignant melanoma.
Oral malignant melanoma is a rare malignant neoplasm of melanocytes or melanocytes precursors.
Malignant melanoma is now the fifth most common cancer in the UK and more than 2,000 people die from the disease each year.

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