CTLA4 and cancer: In order to identify other reported cases with ICB-associated MTB infection, we used the following terms for online search of PubMed: (1) terms suggestive of cancer (e.g., cancer, tumor, malignancy), (2) terms suggestive of immunotherapy (e.g., immune checkpoint inhibitors, PD-L1, PD-1, CTLA4, immunotherapy), (3) terms suggestive of tuberculosis (e.g., tuberculosis, TB, Mycobacterium tuberculosis).