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Telogen effluvium is a scalp disorder characterized by the thinning or shedding of hair resulting from the early entry of hair in the telogen phase (the resting phase of the hair follicle).[1][2] Emotional or physiological stress may result in an alteration of the normal hair cycle and cause the disorder, with potential causes including eating disorders, fever[citation needed], childbirth, chronic illness, major surgery, anemia, severe emotional disorders, crash diets, hypothyroidism, and drugs.[1][3]

Telogen effluvium
Malnurished Afghan Child.jpg
An Afghan child displaying hair loss due to severe malnutrition.
Classification and external resources
Specialty dermatology
ICD-10 L65.0 (ILDS L65.000)
ICD-9-CM 704.02
DiseasesDB 12926

Diagnostic tests, which may be performed to verify the diagnosis, include a trichogram, trichoscopy[4] and biopsy.[3] Effluvium can present with similar appearance to alopecia totalis, with further distinction by clinical course, microscopic examination of plucked follicles, or biopsy of the scalp.[5] Histology would show telogen hair follicles in the dermis with minimal inflammation in effluvium, and dense peribulbar lymphocytic infiltrate in alopecia totalis.[6]

Vitamin D levels may also play a role in normal hair cycle.[7]

See alsoEdit


  1. ^ a b Marks, James G; Miller, Jeffery (2006). Lookingbill and Marks' Principles of Dermatology (4th ed.). Elsevier Inc. Page 263. ISBN 1-4160-3185-5.
  2. ^ James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. ISBN 0-7216-2921-0.
  3. ^ a b Freedberg, et al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. ISBN 0-07-138076-0.
  4. ^ Rudnicka L, Olszewska M, Rakowska A, Kowalska-Oledzka E, Slowinska M (2008). "Trichoscopy: a new method for diagnosing hair loss". J Drugs Dermatol. 7 (7): 651–654. PMID 18664157. 
  5. ^ Werner, B.; Mulinari-Brenner, F. (2012). "Clinical and histological challenge in the differential diagnosis of diffuse alopecia: Female androgenetic alopecia, telogen effluvium and alopecia areata - part II". Anais brasileiros de dermatologia. 87 (6): 884–890. PMID 23197208. 
  6. ^ Alkhalifah, A. (2012). "Alopecia Areata Update". Dermatologic Clinics. 31 (1): 93–108. doi:10.1016/j.det.2012.08.010. PMID 23159179. 
  7. ^ Does D matter? The role of vitamin D in hair disorders and hair follicle cycling. Dermatol Online J. 2010 Feb; 16(2). PMID 20178699