melasma


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melasma

 [mĕ-laz´mah]
melanosis with sharply demarcated blotchy, brown macules usually in a symmetric distribution over the cheeks and forehead and sometimes on the upper lip and neck. It is most often seen in women during pregnancy (melasma gravidarum or “mask of pregnancy”), at menopause, and while taking oral contraceptives; it occasionally occurs in women who are not pregnant or taking oral contraceptives, as well as in men. A similar pattern of facial hyperpigmentation may be associated with chronic liver disease. Called also chloasma.
melasma addiso´nii Addison's disease.
melasma gravida´rum melasma occurring during pregnancy.

me·las·ma

(mĕ-laz'mă),
A patchy pigmentation of sun-exposed skin, seen most commonly in pregnancy.
See also: chloasma.
[G. a black color, a black spot]

melasma

An acquired hypermelanosis with “blotchy” coalescent hyperpigmented macules occuring in sun-exposed areas, especially of the face and neck, which is typically seen in pregnancy or with OC use; it is caused by oxidation of tyrosine to melanin and usually regresses with delivery. A similar mask may appear in men without abnormal hormone levels, and in patients treated with phenytoin.

melasma

Chloasma, mask of pregnancy Obstetrics Darkening of face and neck with 'blotchy' coalescent hyperpigmented macules seen in pregnancy or with OC use, due to oxidation of tyrosine to melanin, often regressing with delivery; a similar mask may appear in ♂ without abnormal hormone levels, and in Pts treated with phenytoin.

me·las·ma

(mĕ-laz'mă)
A patchy or generalized pigmentation of the skin.
See also: chloasma
[G. a black color, a black spot]

Melasma

A dark mask-like discoloration that covers the cheeks and bridge of the nose. Also called "the mask of pregnancy."
References in periodicals archive ?
El estudio de la eficacia de emclarex[R] fue llevado a cabo con evaluacion instrumental del indice de melanina (mexametro), de la cual se ha encontrado bibliografia que sustenta su buena repetibilidad y sensibilidad, tanto para medidas in vitro como in vivo (8,11) y con la cual se pudo demostrar que la combinacion de activos que contiene emclarex[R], brinda resultados en terminos de efectividad sobre el aclaramiento del melasma, puesto que despues de ocho semanas de aplicacion del producto bajo condiciones normales de uso en un panel de 30 voluntarias diagnosticadas con melasma, se evidencio una reduccion estadisticamente significativa en las medidas instrumentales del indice de melanina de 340,1 [+ o -] 111 al inicio a 288,5 [+ o -] 85,4 en la octava semana.
Chemical peeling consists of application of one or more exfoliating agents on skin to obtain first destruction and then regeneration of part of the epidermis and/or dermis and it has become increasingly popular in the treatment of melasma [10].
Melasma appears as a consequence of raised melanin in either the epidermis (the superficial layers) or deeper layers of the skin.
Several other hyperpigmentation disorders were considered on the initial differential diagnosis for this case, including melasma and post-inflammatory hyperpigmentation.
Results: Among 93 patients, centrofacial melasma was more prevalent than maxillary melasma (55.9% vs.
In a lengthy post, the 34-year-old former Miss England goes on to explain what melasma is and how it has affected her life.
Melasma is a word originating from Greek melas, meaning "black." It is a very common hypermelanosis, characterized by well-demarcated gray-brown patches that occur frequently on sun-exposed areas of the face and rarely on the neck and forearms.
For example, tranexamic acid is usually applied at a dose of 250 mg twice per day for at least 3 months to effectively treat melasma [8].
[6] Hypopigmentation was also found as a complication of QS 1064-nm Nd:YAG when it was used for melasma and skin rejuvenation.
(5) Other factors such as heredity and hormonal changes can also lead to abnormal melanin output as we age, resulting in pigmentation disorders like melasma. (6)