Temporal Triangular Alopecia: Clinical and Dermoscopic Features of a Rare Entity

October 2025 in “ Diagnostics ”

Beata Zagórska, Jakub Żółkiewicz, Urszula Maińska, Martyna Sławińska

temporal triangular alopecia TTA alopecia

TLDR Temporal triangular alopecia is a harmless, non-progressive hair loss condition.

An 18-year-old female was diagnosed with temporal triangular alopecia (TTA), characterized by a triangular, non-scarring alopecic patch in the left temporal region present since birth. The condition is non-progressive and does not affect the patient's quality of life, leading to a decision against treatment.

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research Line-Field Optical Coherence Tomography: Usefulness in the Non-Invasive Differential Diagnosis of Congenital Alopecia of Infancy

July 2024 in “Dermatology Practical & Conceptual”

LC-OCT helps accurately diagnose different types of infant hair loss without invasive methods.

research Congenital Triangular Alopecia: A Case of Effective Response with 5% Topical Minoxidil in a Male Adolescent

May 2024 in “Clinical, cosmetic and investigational dermatology”

5% topical minoxidil effectively treated a boy's congenital triangular alopecia without side effects.

research Temporal Triangular Alopecia

January 2023 in “Indian Dermatology Online Journal”

A 23-year-old man has a benign, non-progressive hair loss patch that doesn't respond to treatment but can be cosmetically treated.

Atypical Congenital Triangular Alopecia (Brauer Nevus): Case Report and Literature Review in Occipital and Mid-Frontal Localizations

research Atypical Congenital Triangular Alopecia (Brauer Nevus): Case Report and Literature Review in Occipital and Mid-Frontal Localizations

January 2021 in “Skin appendage disorders”

The report concludes that atypical Brauer nevus is more common in males, present at birth, and often misdiagnosed due to its unusual scalp locations.

research Congenital Triangular Alopecia: A Case Report

3 citations , January 2020 in “International journal of trichology”

Congenital triangular alopecia is a hair loss condition present from birth or early childhood with no effective treatment needed.

research Transient Treatment Response of Platelet-Rich Plasma Injection for Temporal Triangular Alopecia: A Case Report with Dermoscopic Examination Follow-Up

January 2020 in “International Journal of Trichology”

PRP injections are not effective for long-term treatment of temporal triangular alopecia.

research Clinical and Trichoscopic Characteristics of Temporal Triangular Alopecia: A Multicenter Study

32 citations , August 2016 in “Journal of the American Academy of Dermatology”

Temporal triangular alopecia is a non-scarring hair loss in children, often linked to other health conditions.

research Successful Treatment of Temporal Triangular Alopecia with Topical Minoxidil

20 citations , January 2013 in “Annals of Dermatology”

Topical minoxidil successfully treated temporal triangular alopecia.

research Successful Hair Transplantation for Treatment of Acquired Temporal Triangular Alopecia

12 citations , June 2012 in “Dermatologic Surgery”

Hair transplantation effectively treated a woman's patchy hair loss when other treatments failed.

research Temporal Triangular Alopecia: Trichoscopic Diagnosis

35 citations , September 2011 in “The Journal of Dermatology”

Trichoscopy helps accurately diagnose temporal triangular alopecia.

research Temporal Triangular Alopecia and a Review of 52 Past Cases

56 citations , March 2010 in “Journal of Dermatology”

Most cases of Temporal Triangular Alopecia are found in early childhood and may be related to genetic conditions.

research Successful Treatment of Temporal Triangular Alopecia by Hair Restoration Surgery Using Follicular Unit Transplantation

16 citations , June 2009 in “Dermatologic Surgery”

A 17-year-old boy with Temporal Triangular Alopecia successfully grew new hair after a hair restoration surgery using follicular unit transplantation.

research Congenital Triangular Alopecia (Brauer Nevus)

34 citations , December 1995 in “Pediatric Dermatology”

Congenital Triangular Alopecia is a rare, non-scarring hair loss that can be surgically treated in females for cosmetic reasons.