Temporal triangular alopecia is also known as congenital triangular alopecia. It is a nonscarring, noninflammatory, circumscribed form of alopecia. The alopecic lesions are usually asymptomatic and present at birth or during the first nine years of life. Lesions are stable and mostly presents with roughly triangular, oval, or lancet-shaped patches in the frontotemporal region that are characterized by normal hair density of vellous hair and normal epidermis. The condition mostly occurs unilaterally, but bilateral cases (13.5â20%) can occur. TTA is associated with several disorders, one of which is Phakomatosis Pigmentovascularis. PPVs are rare syndromes characterized by the coexistence of pigmentary nevus and a cutaneous vascular malformation.
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Last date updated on October, 2020