Patchy hair loss on the scalp

Case #1

A 46-year-old woman presents with patchy hair loss around the circumference of her head in the frontal, temporal, and occipital regions for the previous 3 months. General and systemic examinations reveal no other abnormalities. The patient has a history of atopic dermatitis. Results of a complete blood count, thyroid panel, renal function tests, and liver function tests are within ...