10 Questions
What is the principal determinant of skin color?
Melanin pigment
What is the most common cause of facial melanosis?
Melasma
What is the name of the condition that results in a yellow-orange hue of the skin due to ingestion of colored fruit and vegetables?
Carotenoderma
What is the name of the hormone that may cause generalized hyperpigmentation when present in excessive amounts?
Melanocyte-stimulating hormone (MSH)
What is the term for the excessive deposition of melanin in the skin?
Hyperpigmentation
What is the most common site of hypermelanosis in melasma?
Upper lip, malar regions, forehead, and chin
What is the speculated reason for increased skin pigmentation in pregnancy and oral contraceptive users?
Increased levels of oestrogen and progesterone stimulating melanocyte activity
What is the purpose of using Wood's lamp examination in melasma?
To determine the type of melasma (epidermal, dermal, or mixed)
What is the typical appearance of dermal melasma?
Grey or bluish
What is the first line of treatment for melasma?
Sun protection and changing oral contraceptive to an alternative low-oestrogen preparation
Test your knowledge of human skin color composition, including biochromes and melanin, and the different types of hyperpigmentation. Learn about the factors that determine skin color and how it can vary.
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