congenital melanosis

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.

mel·a·no·sis (m

-n

Abnormally dark pigmentation of the skin or other tissues, resulting from a disorder of pigment metabolism. Also called melanism.

mela·notic (-n

k) adj.

melanosis.

See melanism.

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.

melanosis (mel´

nō´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.

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.

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black pith cardiomelanosis Erythema Neonatorum focal focal distance focal length focal zone hamartosis hepatomelanosis Hormel pigs laxative abuse melanic melanin melanism melanosis coli melanotic melasma melasma gravidarum myomelanosis	Congenital heart defects congenital heart disease congenital hemolytic anemia congenital hemolytic jaundice congenital hernia congenital herpes congenital hip dislocation Congenital Hip Dysplasia congenital hypernatremia congenital hypertrophy of the retinal pigment epithelium congenital hypogammaglobulinemia congenital hypoplastic anemia congenital hypothyroidism congenital ichthyosiform erythroderma congenital immunity Congenital Insensitivity to Pain with Anhidrosis congenital jaundice congenital laryngeal stridor congenital leukemia congenital leukemoid reaction congenital lobar emphysema congenital lymphedema congenital malformation Congenital Malignancy congenital megacolon congenital melanosis congenital myxedema congenital nevus congenital nonspherocytic hemolytic anemia congenital nystagmus congenital oculofacial paralysis congenital pancytopenia congenital paramyotonia congenital platelet function defect congenital polycystic disease congenital pouch colon congenital pulmonary arteriovenous fistula congenital pyloric stenosis congenital reduced phalanges congenital rubella syndrome congenital scleral crescent congenital scoliosis congenital short neck syndrome congenital sternal foramina congenital stridor congenital subluxation of the hip congenital syphilis congenital total lipodystrophy congenital toxoplasmosis congenital tremor syndrome Congenital Ureter Anomalies	congenital loco congenital loco congenital loco congenital lymphedema congenital lymphedema congenital lymphedema congenital lysine intolerance congenital lysine intolerance congenital lysine intolerance congenital macular degeneration congenital macular degeneration congenital macular degeneration congenital macular degeneration Congenital Malalignment of the Great Toenails Congenital malformation Congenital malformation Congenital malformation Congenital malformation of heart Congenital malformations Congenital malformations Congenital malformations of heart Congenital Malignancy congenital megacolon congenital megacolon congenital megacolon Congenital Megaureter in a Solitary Kidney Congenital melanocytic nevus congenital melanoma of pigs congenital melanoma of pigs congenital melanoma of pigs congenital melanosis congenital meningoencephalocele congenital meningoencephalocele congenital mesoblastic nephroma congenital mesoblastic nephroma Congenital metabolic disease Congenital metabolic disease congenital methemoglobinemia congenital methemoglobinemia Congenital Microangiopathic Hemolytic Anemia and Thrombocytopenia Congenital microcoria Congenital Middle Ear Encephalocele Congenital Motor and Sensory Neuropathy Congenital Motor Nystagmus Congenital mumps Congenital mumps Congenital mumps congenital muscle defects congenital muscle defects congenital muscle defects Congenital Muscle Hypotonia Congenital Muscle Hypotonia Congenital Muscle Hypotonia Congenital Muscle Weakness Congenital Muscle Weakness Congenital Muscle Weakness Congenital muscular dystrophy Congenital myasthenia gravis Congenital myasthenia gravis Congenital myasthenia gravis Congenital myasthenic syndrome

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