First AD

Second AD

An 89-year-old woman with a history of biopsy-proven actinic keratosis on her scalp is seen for a new erosion on the right frontal area. Two weeks of twice-daily mupirocin has brought no improvement and now crusting and purulent exudate are seen. Skin cultures taken show normal flora.

C. Erosive pustular dermatosis of the scalp

E. Chronic actinic damage with secondary infection

Answer: C. Erosive pustular dermatosis of the scalp

Skin Diseases

An 89-year-old woman is seen for an erosion on the frontal area of the scalp. History is positive for actinic keratosis. What's your Dx?

Crusty Scalp Lesion

Yusuf Anwar

Michelle Xu

Eve J. Lowenstein, MD, PhD