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Year : 2016  |  Volume : 61  |  Issue : 1  |  Page : 125
Triangular temporal alopecia revisited

Department of Dermatology, Chacha Nehru Bal Chikitsalaya, New Delhi, India

Date of Web Publication15-Jan-2016

Correspondence Address:
Prashant Verma
Department of Dermatology, Chacha Nehru Bal Chikitsalaya, New Delhi
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0019-5154.174179

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How to cite this article:
Verma P. Triangular temporal alopecia revisited. Indian J Dermatol 2016;61:125

How to cite this URL:
Verma P. Triangular temporal alopecia revisited. Indian J Dermatol [serial online] 2016 [cited 2023 Mar 28];61:125. Available from:

The Editor,

A 7-year-old boy was accompanied by his mother to our dermatology department with complaint of an asymptomatic patch of hair loss over the left side of his scalp. The patch of hair loss was noticed by his mother during infancy and has been static ever since. The mother denied any preceding trauma and/or traction. There was no previous history of similar episode. Clinical examination revealed a 10 cm (across the length) sized lance-shaped patch of alopecia afflicting the left fronto-temporal region of the child's scalp [Figure 1]. Vellus hairs, otherwise apparently normal in density, were conspicuous by their presence on the patch of alopecia. No exclamation hairs were seen. There was no other surface change in the skin of the affected area of the scalp. Potassium hydroxide mount preparation of the hair from the affected scalp did not reveal fungal elements. Accordingly, a diagnosis of triangular temporal alopecia was rendered.
Figure 1: Lance-shaped patch of alopecia afflicting the left fronto-temporal region of scalp with surface depicting vellus hair

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Triangular temporal alopecia was first reported by in the year 1905. More than 50 cases have been reported so far. [1] Temporal triangular alopecia/congenital triangular alopecia may be present at birth or may be acquired during the first decade of life. [2] Alopecic patch in the fronto-temporal scalp of a child is the usual scenario, however, lesions rarely occur outside the temporal area or may present during adulthood. The lancet-shaped lesions, few centimeters in width, either unilateral or bilateral, and oriented so with the tip of the "lancet" superiorly and posteriorly are the cardinal features. [3] Lesions appear hairless, but characteristically, very fine vellus hairs can be seen with magnification and trichoscopy. [4] Accordingly, the diagnosis of triangular temporal alopecia is clinical. Unfortunately, there is no effective treatment for this condition and the patches of alopecia persist for life. Surgical excision and hair grafting have been suggested. [3] Minoxidil has also been used effectively, however, with a relapse soon following treatment cessation. [5]

   References Top

Gupta LK, Khare A, Garg A, Mittal A. Congenital triangular alopecia: A close mimicker of alopecia areata. Int J Trichol 2011;3:40-1.  Back to cited text no. 1
[PUBMED]  Medknow Journal  
Bargman H. Congenital triangular alopecia. J Am Acad Dermatol 1988;18:390.  Back to cited text no. 2
Trakimas C, Sperling LC, Skelton HG 3 rd , Smith KJ, Buker JL. Clinical and histologic findings in temporal triangular alopecia. J Am Acad Dermatol 1994;31:205-9.  Back to cited text no. 3
Karadað Köse O, Güleç AT. Temporal triangular alopecia: Significance of trichoscopy in differential diagnosis. J Eur Acad Dermatol Venereol 2014. [Epub ahead of print]  Back to cited text no. 4
Bang CY, Byun JW, Kang MJ, Yang BH, Song HJ, Shin J, et al. Successful treatment of temporal triangular alopecia with topical minoxidil. Ann Dermatol 2013;25:387-8.  Back to cited text no. 5


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This article has been cited by
1 Congenital triangular alopecia - A case report
DhruvRamanbhai Patel, JinalJainendrabhai Tandel, PragyaAshok Nair
International Journal of Trichology. 2020; 12(2): 89
[Pubmed] | [DOI]


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