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.

Anti-PD-1 induced collagenous colitis in metastatic melanoma: a rare severe adverse event.

Immunotherapy has improved the overall survival of patients with metastatic melanoma. Inflammatory bowel disease-like colitis is the most frequent gastrointestinal serious adverse event in patients treated with immune-checkpoint inhibitors. Collagenous colitis is microscopic colitis.