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

(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

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]
References in periodicals archive ?
Periorbital melanosis (POM, also known as periorbital hyperpigmentation, is a common condition observed in dermatological practice.
In addition, the proportion of participants with both melanosis and hyperkeratosis, a later stage of skin lesion, differed according to well arsenic levels (p < 0.01).
Mucosal melanomas may be multifocal, and this has been shown in rare case reports of patients with underlying melanosis. (9,11) The added challenge in the sinonasal tract region is determining whether multiple specimens are contiguous or indeed multifocal.
As a result of these findings, the patient was diagnosed with prostatic melanosis with prostatic adenocarcinoma.
Neurocutaneous melanosis (NCM) is a rare congenital nonfamilial nonheritable neurocutaneous syndrome with equal gender preponderance.
Papilloma, hamartoma, juvenile polyp, Crohn's disease, and melanosis coli are rare causes of Al (15-18).
Entre los signos clinicos registrados con mayor frecuencia se encuentra la anorexia (90%) y la melanosis (76%) (Cuadro 2), que aparecieron a las 12 horas de la inoculacion en G3 y G4, y al 3er dia pos-inoculacion (dpi) en G1 y G2 (Cuadro 3).
Symptoms can include periclitoral edema, white patches, pale skin, textural changes (such as wrinkling, waxiness, or hyperkeratosis), fissures, melanosis, and sometimes ulcerations or erosions from scratching.
Becker melanosis (also called Becker's nevus or Becker's pigmentary hamartoma) is an organoid hamartoma that is most common among males.
Tumoral melanosis is a rare histopathological phenomenon characterized by confuent dermal nodular aggregates of heavily melanized polygonal cells consistent with melanophages.
The most common evolution of pigmentary change was following the generalized maculopapular rash, which might be because of increased intraepidermal melanin dispersion/retention triggered by the virus.4,13 Variety of patterns like nose only, diffuse slate-gray facial, freckle like, generalized and periorbital were noted as has been seen in previous studies also.5,11-13 In addition, the pigmentation over nose which has been referred to as 'Chik sign' in a previous study11 was noted predominantly in males (Figure 1) while speckled and diffuse facial melanosis was noted predominantly in females (Figure 2 a and b).
The pathology of the bladder biopsies noted "melanosis," a generally benign condition.