melanosis


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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.
References in periodicals archive ?
Statistical comparisons were made between the clove oil and phenoxyethanol exposed groups within melanosis and not melanosis groups and then male-female swordfish groups by using the non-parametric Mann-Whitney U-test.
Pilot study 3 mo [23] 2015 GSH soap: melanosis of the face Watanabe Ibaraki, Japan 30 (female), 30-50 yr et al.
Otros procesos, como la vernix caseosa, el rubor generalizado, hipertricosis, melanosis pustulosa neonatal transitoria o la inestabilidad vasomotora cutanea, desapareceran a los pocos dias o semanas.
La captura de un ejemplar de Cheilodactylus variegatus (Cheilodactylidae) (bilagai, bilagay, pintadilla, morwongs) constituye el primer registro de un caso de melanosis para esta especie y se espera contribuir al conocimiento sobre su variabilidad intraespecifica.
characteristic skin lesions, melanosis (darkening of skin) and keratosis (thickening of the skin of palms and soles) (Kadono et al.
According to Pollakowna who discusses the triptych in her essay "Clay and Light," the painter experienced a spiritual transformation as he moved from the dark melanosis through yellow xanthosis to the red iosis.
En mucosas, piel y faneras: irritacion, edema facial acompanado de melanosis y descamacion, lineas de Mees en unas (1,3,14,15,25); hiperpigmentacion de pezones, cicatrices de cuello y axilas o leucomelanodermias, que progresan a hiperqueratosis palmo plantar o a enfermedad de Bowen y pueden terminar en carcinoma de piel (37-40,41).
Neonatal (birth-6 weeks) acne has a prevalence of 20%, though these lesions actually may represent acneiform conditions such as self-limited neonatal cephalic pustulosis or transient neonatal pustular melanosis.
On histopathological examination, skin sections of buffaloes treated for leukoderma showed evidence of melanosis characterized by reappearance of melanocytes in stratum basale and melanin in epidermis.
Las variantes de lo normal como son melanosis fisiologica, linea alba oclusal, granulos de Fordyce, leucoedema y las varicosidades, fueron excluidas de este estudio, unicamente se incluyo la lengua geografica por su posible asociacion con ciertas enfermedades dermicas o alergicas.
Becker SW: Concurrent melanosis and hypertrichosis in distribution of nevus unius lateris.
Ocular melanosis/benign melanosis is a common bilateral condition of conjunctival pigmentation.