melanosis

(redirected from congenital melanosis)
Also found in: Dictionary, Thesaurus, Encyclopedia.

melanosis

 [mel″ah-no´sis]
1. disordered melanin production, with darkening of the skin; called also melanism.
2. a disorder of pigment metabolism.
melanosis co´li brown-black discoloration of the mucosa of the colon.
melanosis i´ridis (melanosis of the iris) abnormal pigmentation of the iris by infiltration of melanoblasts.

mel·a·no·sis

(mel'ă-nō'sis),
Abnormal dark brown or brown-black pigmentation of various tissues or organs, as the result of melanin or, in some situations, other substances that resemble melanin to varying degrees; for example, melanosis of the skin may occur in widespread metastatic melanoma, sunburn, during pregnancy, and as a result of chronic infections.
[melano- + G. -osis, condition]

melanosis

/mel·a·no·sis/ (mel″ah-no´sis) melanism; disordered production of melanin, with darkening of the skin.
melanosis co´li  black or dark brown discoloration of the mucosa of the colon, due to the presence of pigment-laden (not true melanin) macrophages within the lamina propria.
neurocutaneous melanosis  giant hairy nevus accompanied by malignant melanomas of the meninges.

melanosis

(mĕl′ə-nō′sĭs)
n. pl. melano·ses (-sēz)
Abnormally dark pigmentation of the skin or other tissues, resulting from a disorder of pigment metabolism. Also called melanism.

mel′a·not′ic (-nŏt′ĭk) adj.

melanosis

See melanism.

melanosis

A general term for the deposition of melanin or melanin-like pigment (e.g., ceroid, lipofuscin) in tissues.

mel·a·no·sis

(mel'ă-nō'sis)
Abnormal dark brown or brown-black pigmentation of various tissues or organs, as the result of melanin or, in some situations, other substances that resemble melanin to varying degrees; e.g., melanosis of the skin may occur in widespread metastatic melanoma, sunburn, during pregnancy, and as a result of chronic infections.
[melano- + G. -osis, condition]

melanosis

Abnormal pigmentation of the tissues from excessive deposition of MELANIN. Melanosis coli is pigmentation of areas of the COLON due to an accumulation of MACROPHAGES containing melanin or a similar pigment.

melanosis

An abnormal accumulation of melanin pigment in the skin or other tissues. If there is a larger quantity than normal of pigment in the tissues of the eye, the condition is referred to as melanosis bulbi (melanosis oculi) or primary acquired melanosis when on the conjunctival epithelium and limbus. It may extend onto the peripheral cornea. It may be benign or become malignant, in which case nodules appear and excision or cryotherapy is required. See naevus of Ota.

mel·a·no·sis

(mel'ă-nō'sis)
Abnormal dark brown or brown-black pigmentation of various tissues or organs, as the result of melanin or, in some situations, other substances that resemble melanin to varying degrees.
[melano- + G. -osis, condition]

melanosis (mel´ənō´sis),

n the condition in which melanin pigments appear in the tissues. Melanosis is normal in the gingivae of most dark-skinned individuals and occasionally in those with light skin.

melanosis

1. a condition characterized by dark pigmentary deposits.
2. a disorder of pigment metabolism.

melanosis coli
brown-black discoloration of the mucosa of the colon.
congenital melanosis
patches of melanin in the capsule and stroma of the liver or lung in the neonate.
liver melanosis
see hepatic lipofuscinosis.
Medical browser ?
Full browser ?