Methods of Hair Loss Evaluation: A Comparison of TrichoScan with the Modified Wash Test

    May 2013 in “ Experimental Dermatology ”
    Marcella Guarrera, Maria Cristina Fiorucci, Alfredo Rebora
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    TLDR The modified wash test is better than TrichoScan® for diagnosing hair loss.
    In the 2013 study comparing the modified wash test (MWT) and TrichoScan® for diagnosing hair loss in 41 subjects, researchers found that MWT had a fair concordance with clinical diagnosis (K = 0.32), while TrichoScan® had a less satisfactory concordance (K = 0.22). The two methods agreed in only 41% of cases. MWT was more effective, particularly in detecting telogen effluvium (TE), with 29% versus 19% for TrichoScan®. The study recommended using MWT and dermoscopy alongside clinical observation for hair loss diagnosis, reserving biopsy for particularly challenging cases, and suggested that TrichoScan® might be less useful and potentially misleading, especially in cases of TE.
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