melasma
MELASMA
Melasma is an acquired hypermelanosis skin disorder that commonly affects women than men. It is characterized by irregular light to dark brown macules occurring in the sun-exposed areas of the face, neck and arms.
It occurs most commonly with pregnancy and with the use of contraceptive pills.
Other factors implicated in the etiopathogenesis are photosensitizing medications, mild ovarian or thyroid dysfunction and certain cosmetics.
Solar and ultraviolet exposure is the most common important factor in its development.

Definition

  • Acquired hyperpigmentary skin disorder characterized by irregular light to dark brown macules occurring in the sun-exposed areas of the face, neck & arms
  • Occurs most commonly with pregnancy (chloasma) & with the use of contraceptive pills
  • Other factors implicated in the etiopathogenesis are photosensitizing medications, genetic factors, mild ovarian or thyroid dysfunction, & certain cosmetics
  • Most commonly affects Fitzpatrick skin phototypes III & IV 
  • More common in women than in men
  • Rare before puberty & common in women during their reproductive years
  • Solar & ultraviolet exposure is the most important factor in its development

Etiology

  • Other factors implicated in the etiopathogenesis are photosensitizing medications, mild ovarian or thyroid dysfunction, & certain cosmetics 
  • Solar & ultraviolet exposure is the most important factor in its development
Editor's Recommendations
Most Read Articles
4 days ago
Poor overall diet quality, particularly low intake of vegetable protein, appears to put elderly adults at greater risk of frailty, a recent study has found.
Pearl Toh, 15 Jul 2019
In addition to the known evils of maternal smoking during pregnancy on the son’s semen quality, prenatal exposure to paternal smoking can also be harmful, according to data from the large Danish National Birth Cohort (DNBC) presented at the ESHRE 2019 Meeting.
2 days ago
Health-related quality of life (HRQoL) among patients with kidney stone is worse in those who are young and female than those who are older and male, according to a recent study. Non-Caucasian patients also have a lower HRQoL.
Tristan Manalac, 3 days ago
In patients with ST-segment elevation myocardial infarction (STEMI) treated by primary percutaneous coronary intervention (PPCI), admission Killip classification and creatinine and troponin levels are important cardiac mortality predictors, according to a recent Singapore study.