Congenital temporal triangular alopecia.

Congenital temporal triangular alopecia (CTTA) is a condition that occurs very rarely and is often unresponsive to treatment. It is necessary to differentiate it from other conditions such as alopecia areata in order to avoid prolonged treatment which may cause adverse side effects. Two additional cases of CTTA are presented herein. The first case was initially seen eighteen years ago. CTTA was diagnosed after a short period of time, but only after the patient had been mistakenly treated for alopecia areata. In the second case, CTTA was diagnosed during the first examination and no treatment was given. I believe that this condition is not as rare as formerly thought, and I also think that some cases may be misdiagnosed when the physician is not aware that he is presented with a case of CTTA.