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Drugs and diseases reference index

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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «M»:

  1. Melanoma, ciliary body Melanoma, ciliary body
    Melanoma, ciliary body: See: Intraocular melanoma....
  2. Melanoma, conjunctival Melanoma, conjunctival
    Melanoma, conjunctival: An uncommon eye cancer that arises in the conjunctiva, the clear membrane that covers the outer surface of the eye and the inner part of the eyelids. Conjunctival melanoma accounts for 2% of all eye malignancies and tends, like melanoma of the skin, to occur in lightskinned ...
  3. Melanoma, eye Melanoma, eye
    Melanoma, eye: See: Intraocular melanoma....
  4. Melanoma, intraocular Melanoma, intraocular
    Melanoma, intraocular: See: Intraocular melanoma....
  5. Melanoma, iris Melanoma, iris
    Melanoma, iris: See: Intraocular melanoma....
  6. Melanoma, lentigo maligna Melanoma, lentigo maligna
    Melanoma, lentigo maligna: One of the four clinical types of malignant melanoma and the slowest growing one. It typically begins as a patch of mottled pigmentation that is dark brown, tan, or black on sun-exposed skin, such as on the face....
  7. Melanoma, malignant Melanoma, malignant
    Melanoma, malignant: See: Melanoma....
  8. Melanoma, nodular Melanoma, nodular
    Melanoma, nodular: One of the four clinical types of malignant melanoma, typically presents as a raised, distinct, bluish-black tumor that may be encircled by particularly pale skin, most often in middle-aged or older adults....
  9. Melanoma, ocular Melanoma, ocular
    Melanoma, ocular: A malignant melanoma arising from a structure within the eye. The most common sites of origin are the choroid, ciliary body, and iris. It tends to occur after age 40. The tumor may metastasize from the eye. The most common site of metastasis is the liver. See also: Conjunctival ...
  10. Melanoma, superficial spreading Melanoma, superficial spreading
    Melanoma, superficial spreading: One of the four clinical types of malignant melanoma, the most common type in whites, typically presents as a raised, irregular, colored area that starts in a mole-like shape but spreads across the skin....
  11. Melanoma, uveal Melanoma, uveal
    Melanoma, uveal: See: Intraocular melanoma....
  12. Melanosis coli Melanosis coli
    Melanosis coli (Pseudomelanosis coli): A benign, reversible condition usually, but not always, associated with long-term use of anthranoid laxatives in which pigment deposition in the lamina propria of the large intestine results in a brown to black discoloration of the mucosa (lining) of the la...
  13. MELAS syndrome MELAS syndrome
    MELAS syndrome: MELAS is the acronym for Mitochondrial Encephalopathy, Lactic Acidosis, and Stroke-like episodes. MELAS is a rare form of dementia. It is caused by mutations in the genetic material (DNA) in the mitochondria. While most of our DNA is in the chromosomes in the cell nucleus, another...
  14. Melasma Melasma
    Melasma: Pigmentation of the face, most commonly on the malar area (the upper cheek), bridge of nose, forehead, and upper lip, that occurs in half of women during pregnancy. Birth control pills can also cause melasma. However, hormone therapy after menopause does not cause the condition. Melasma dar...
  15. Melatonin Melatonin
    Melatonin: A hormone produced by the pineal gland, melatonin is intimately involved in regulating the sleeping and waking cycles, among other processes. Melatonin supplements are sometimes used by people who have chronic insomnia. Always see your doctor before taking melatonin, as it is not rec...