Alopecia laboratory findings

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Ogechukwu Hannah Nnabude, MD


Some causes of alopecia may present with abnormal laboratory findings. For example, thyroid stimulating hormone levels may be elevated in hypothyroidism. In syphilis, patients may have an elevated rapid plasma reagin level. Hence, laboratory investigations may help narrow down the cause of alopecia.

Laboratory Findings

Electrolyte and Biomarker Studies

The following laboratory tests can be completed in cases of a patient presenting with alopecia.

There are other tests available in cases in which there are other symptoms associated with alopecia.


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  3. Almohanna HM, Ahmed AA, Tsatalis JP, Tosti A (2019). "The Role of Vitamins and Minerals in Hair Loss: A Review". Dermatol Ther (Heidelb). 9 (1): 51–70. doi:10.1007/s13555-018-0278-6. PMC 6380979. PMID 30547302.
  4. El Tahlawi SM, El Eishi NH, Kahhal RK, Hegazy RA, El Hanafy GM, Abdel Hay RM; et al. (2018). "Do Prolactin and its Receptor Play a Role in Alopecia Areata?". Indian J Dermatol. 63 (3): 241–245. doi:10.4103/ijd.IJD_590_17. PMC 5996625. PMID 29937561.
  5. Lee JH, Lim CS, Lee MG, Kim HS (2014). "Comparison of an automated rapid plasma reagin (RPR) test with the conventional RPR card test in syphilis testing". BMJ Open. 4 (12): e005664. doi:10.1136/bmjopen-2014-005664. PMC 4281540. PMID 25552608.
  6. Wolff H, Fischer TW, Blume-Peytavi U (2016). "The Diagnosis and Treatment of Hair and Scalp Diseases". Dtsch Arztebl Int. 113 (21): 377–86. doi:10.3238/arztebl.2016.0377. PMC 4908932. PMID 27504707.

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