CTLA4 and cancer: An SLR can also be found in the case of opportunistic infections in such a population (e.g., cryptococcosis, atypical mycobacteria, tuberculosis, nocardiosis, actinomycosis, ...), in case of disseminated Bacille de Calmette de Guérin (BCG) infection after instillation of BCG therapy for bladder cancer, or in case of cancer-specific treatments [anti-programmed death-(ligand)1 (PD-(L)1)/anti-cytotoxic T-lymphocyte antigen 4 (CTLA4)/anti-MAP/ERK kinase (MEK)/anti-B-Raf proto-oncogene (BRAF)] (10).