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Wash test to distinguish between AGA and telogen effluvium (Androgenetic Alopcia (AGA) Female Pattern)
Wash test to distinguish between AGA and telogen effluvium
The wash test was first introduced to quantify the amount of hair lost under standardized washing conditions. It is a non-invasive method to measure hair loss by counting and identifying rinsed out hairs.The wash test was modified by Rebora et al. as the so-called AGA/TE wash test in order to distinguish
between AGA and telogen effluvium (TE), by counting the number of vellus and terminal telogen hairs rinsed out on washing.
Procedure
After a 5-day abstention from shampooing, the patients wash and rinse their hair in a basin whose hole is covered by gauze to entrap the lost hairs. Hairs are then collected in a paper envelope and brought to the examiner
for hair count and further analyses. For the AGA/TE modified wash test, the hairs are counted and divided into three classes of hair length:
(1)long hair >5 cm,
(2) intermediate hair (>3 to <5 cm),
(3) short vellus hair (<3 cm).
Hairs shorter than 3 cm are counted as telogen vellus hairs. The final results of the AGA/TE modified wash test are given as the total number of telogen hairs and the percentage of telogen vellus hairs.
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- Wash test to distinguish between AGA and telogen effluvium - HairSite Admin, 31.08.2008, 02:35 (Androgenetic Alopcia (AGA) Female Pattern)