In Situ Patch Test and Repeated Open Application Test for Fixed Drug Eruption: A Multicenter Study.

Background: Few studies have evaluated allergy workup in fixed drug eruption (FDE) in a large population.

Objective: To evaluate the sensitivity of a standardized allergy workup for diagnosing the cause of FDE, with a focus on in situ repeated open application tests (ROATs).

Methods: In a retrospective multicenter study, we analyzed the practice of conducting a complete allergy workup for the etiological diagnosis of FDE.

Pustular Lichenoid Eruptions Induced by Immune Checkpoint Inhibitors: Two Case Reports and a Review of the Literature.

Immune checkpoint inhibitors (ICIs) have become the standard treatment for many types of cancer. After several years of using these therapies, many adverse events related to ICIs have been observed. Dermatologic toxicities such as nonspecific morbilliform rash, vitiligo, Stevens-Johnson syndrome/toxic epidermal necrolysis, and more rarely, lichenoid eruptions have been described in the literature.