The Dermatologist’s Board Review - January/February 2021 Authors Amy J. McMichael, MD, Section Editor Issue Volume 29 - Issue 1 - January/February 2021 Article Type Board Review Login or Register to download PDF The Dermatologist's Board Review - January/February 2021The contents of these questions are taken from the Galderma Pre-Board Webinar. The Pre-Board Webinar is now an online course. For details, go to http://www.galdermausa.com/Our-Commitment/PreBoard-Webinar.aspx.This patient, as well as her mother and brother, had repeated episodes of nonpruritic lesions like these for many years. An acute episode of dyspnea following a visit to her dentist necessitated hospitalization for a “drug reaction.” The diagnosis is:The diagnosis is: