Melanosis
Encyclopedia
Melanosis is a form of hyperpigmentation
associated with increased melanin
.
It can can refer to:
Hyperpigmentation
In dermatology, hyperpigmentation is the darkening of an area of skin or nails caused by increased melanin.-Causes:Hyperpigmentation may be caused by sun damage, inflammation, or other skin injuries, including those related to acne vulgaris...
associated with increased melanin
Melanin
Melanin is a pigment that is ubiquitous in nature, being found in most organisms . In animals melanin pigments are derivatives of the amino acid tyrosine. The most common form of biological melanin is eumelanin, a brown-black polymer of dihydroxyindole carboxylic acids, and their reduced forms...
.
It can can refer to:
- MelanismMelanismMelanism is an undue development of dark-colored pigment in the skin or its appendages, and the opposite of albinism. It is also the medical term for black jaundice.The word is deduced from the , meaning black pigment....
- Ocular melanosisOcular melanosisOcular melanosis , also known as ocular melanocytosis or melanosis oculi, is a congenital disease of the eye which affects about 1 in every 5000 people and is a risk factor for uveal melanoma. In dogs is found almost exclusively in the Cairn Terrier, where until recently it was known as pigmentary...
- Smoker's melanosisSmoker's melanosisSmoker's melanosis is characterized by flat, irregular hyperpigmentation of the connective tissue underlying the oral mucosa resulting from tobacco smoking. Basal cells and macrophages in the underlying connective tissue contain unusual amounts of melanin, which creates the darker pigmentation...
- Oral melanosisOral melanosisOral melanosis is pigmentation of the oral cavity that tends to occur most frequently in black persons.- See also :* List of cutaneous conditions* Melanocytic oral lesion* Mucous membrane* White sponge nevus...