Congenital Triangular Alopecia

The patient is an 11 y.o boy seen for an unrelated problem.  His mother noted an alopecic area in her newborn and attributed it to something the obstetrician did,

O/E:  There is a 1.5 xm area of alopecia on the left fronto-temporal area.

Diagnosis: Temporal (Congenital) Triangular Alopecia

We have presented two similar cases in the past.

Here is a free full text article from the Indian Journal of Dermatology