By Gary M. White, MD
The flag sign is the presence of alternating light and dark bands of the hair in a patient suffering from intermittent bouts of malnutrition. Light bands develop at the root of the hair during periods of malnutrition. If periods of malnutrition alternate with periods of adequate nutrition, multiple light and dark bands form which are reminiscent of the stripes on a flag.
- Kwashiorkor is primarily a deficiency of protein.
- Marasmus results from inadequate nutrition of all kinds but especially of energy sources.
Adequate nutrition is curative.
Depigmentation of hair with malnutrition and repigmentation after restoration of nutrition. An. Bras. Dermatol. vol.86 no.6 Rio de Janeiro Nov./Dec. 2011
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