Melanosis

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Related to melanotic: melanotic schwannoma, melanotic macule

Melanosis

 

the intensified formation and deposit in organs and tissues of a dark brown or black pigment of the melanin group (normally present in the skin, retina, and meninges).

A distinction is made between congenital melanosis and acquired melanosis. The former includes congenital melanosis of the skin (melanoderma), manifested by freckles or pigmented birthmarks. Acquired melanosis frequently develops as a result of a change in endocrine function (adrenal, pituitary, or gonadal). The pigmentation may be diffuse (for example, in Addison’s disease) or circumscribed (for example, during pregnancy, on the face and around the nipples). The condition may also be caused by systemic poisoning by hydrocarbons (toxic melanoderma) or by physical, mechanical, or chemical irritation (light, heat, the distillate products of coal).

References in periodicals archive ?
Oral melanotic pigmentation has to be differentiated from certain other similar conditions exhibiting hyperpigmentation.
19] In melanotic RCC, dark-brown endogenous pigments can be found; the kidney may appear black one, and the differential diagnosis may be hemosiderin, homogentisic acid and lipofuscin.
Trelles MA, Verkruysse W, Segui JM, Udaeta A: Treatment of melanotic spots in the gingiva by argon laser.
The role of reactive oxygen species on Plasmodium melanotic encapsulation in Anopheles gambiae.
Endoscopic tumor appearance is classified into ulcerated melanotic nodules, submucosal masses with ulcerations, and mass lesions with necrosis and melanosis (Figure1).
There may be an orange pigmentation overlying the melanotic lesion, and an area of retinal detachment, usually inferiorly.
A 48-year-old man was admitted to the hospital in November with coffee-ground emesis and melanotic stools for five days.
in 1964 studied the vaginal mucosa of 100 random autopsies and found melanotic lesions in three cases (4).
A total of twenty-six different mucosal changes were diagnosed, the most common of which were melanotic maculae (36.
The main differential diagnoses include Bohn's nodules, Epstein's pearls, mucocele, eruption cyst, infantile melanotic neuroectodermal tumor, and Abrikossoff's tumor (1).
The method also enhance image low-level features like edges, peaks, valleys, and ridges, which is equal to enhancing key facial element information such as the nose, eyes, and mouth plus local characteristics like dimples, melanotic nevus and scars.
22) Subungual melanotic bands unrelated to malignant melanoma are common in black patients, but rare in whites.