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
Pearl Toh, 6 days ago
Every-two-month injections of the long-acting cabotegravir + rilpivirine were noninferior to once-monthly injections for virologic suppression at 48 weeks in people living with HIV*, according to the ATLAS-2M** study presented at CROI 2020 — thus providing a potential option with more convenient dosing.
Stephen Padilla, 19 Mar 2020
The assumption that children are less vulnerable to the coronavirus disease 2019 (COVID-19) compared to adults is not quite true and may even be dangerous, suggests a recent study.
22 Mar 2020
Sustained use of lopinavir-combined regimen appears to confer benefits among patients with the novel coronavirus disease (COVID-19), with improvement possibly indicated by increasing eosinophils, suggests a recent study.
24 Mar 2020
COVID-19 is a novel disease, with no existing immunity. The virus can be transmitted from person to person, quickly and exponentially. Here’s what we can do to slow down the spread, if not contain the outbreak.