Journal of Medical & Surgical Pathology
Open Access

Department of Pathology, University of Toledo College of Medicine and Life Sciences, Toledo, Ohio, United States

Publications

• Case Report   
  Congenital Triangular Alopecia Indicating Underlying Disorders
  Author(s): Riddhish T. Sheth* and Shivang T. Sheth
  
  Congenital Triangular Alopecia (CTA), also known as temporal triangular alopecia or Brauer nevus, is a non-cicatricial pattern of hair loss that can present at birth, in infancy, or later in life. The condition typically affects the frontotemporal region of the scalp and presents as a non-progressive triangular, or lancet shaped patch of alopecia. The exact etiology of CTA is unknown, though it was once considered to be congenital. It appears to be sporadically acquired in most individuals; however, there have been a small number of familial cases. It is postulated that CTA may reflect mosaicism and may be inherited as a para-dominant trait where a postzygotic loss of the wild type allele in a heterozygote state leads to disease. Others have suggested that CTA may be an ectodermal defect and should be included in the group of epidermal nevi, though no consensus has been reached. The e.. View More»
  

  Abstract PDF