Background/Objectives: Teclistamab is a B-cell maturation antigen (BCMA)-directed bispecific antibody approved for relapsed or refractory multiple myeloma (RRMM). Although prior analyses have summarized teclistamab outcomes, some have included combination regimens or broader comparative studies. Given the expanding real-world experience with teclistamab, we conducted a systematic review and meta-analysis focused on teclistamab monotherapy in RRMM. Methods: We performed a systematic review and meta-analysis of clinical trials and retrospective real-world studies evaluating teclistamab monotherapy in RRMM. The primary endpoint was overall response rate (ORR). Secondary endpoints included complete response (CR), overall mortality rate (OMR), mortality due to multiple myeloma progression, teclistamab-attributed mortality, adverse event-related mortality, grade ≥3 cytokine release syndrome (CRS), grade ≥3 immune effector cell-associated neurotoxicity syndrome (ICANS), and other grade ≥3 adverse events. Pooled proportions were estimated using random-effects models. Results: Twelve studies including 761 patients were analyzed, comprising two clinical trials and ten real-world retrospective cohorts. The pooled ORR was 60.9%, and the pooled CR rate was 25.2%. The pooled OMR was 26.9%, with mortality due to myeloma progression of 23.9%, adverse event-related mortality of 8.1%, and teclistamab-attributed mortality of 3.3%. Severe (grade ≥3) CRS and ICANS were uncommon, with grade ≥3 events occurring in 1.7% and 3.1%, respectively. Grade ≥3 infections occurred in 28.3%. Common grade ≥3 hematologic adverse events included lymphopenia, neutropenia, anemia, and thrombocytopenia. Conclusions: Teclistamab monotherapy demonstrates meaningful clinical activity and a manageable immune toxicity profile in heavily pretreated RRMM. However, severe infections and hematologic toxicities remain important clinical considerations, supporting the need for close monitoring, infection prevention, and supportive care during therapy.

Graft-versus-host disease (GVHD) is a rare but severe complication following solid organ transplantation, with limited literature guiding diagnosis and management. We present a 55-year-old man with alcohol-associated end-stage liver disease who developed GVHD approximately one month after orthotopic liver transplantation (LT). He was initially admitted for persistent fever and concern for sepsis, with subsequent development of progressive pancytopenia and a non-pruritic maculopapular rash with mucosal involvement. Skin biopsy performed on hospital day 10 supported the diagnosis of GVHD, and donor chimerism testing demonstrated 70% donor-derived CD3+ lymphocytes. He improved with high-dose intravenous methylprednisolone and remained clinically stable on ruxolitinib maintenance therapy at two-month post-discharge follow-up. GVHD following LT should be considered early in patients with non-specific presentations, such as unexplained fever, cytopenias, rash, or mucosal findings. Early recognition, tissue biopsy, and chimerism testing may facilitate timely intervention and improve outcomes in this rare condition associated with high mortality.

Background/Objectives: Lisocabtagene maraleucel (liso-cel) is a CD19-directed chimeric antigen receptor T-cell (CAR-T) therapy approved for relapsed or refractory large B-cell lymphoma (R/R LBCL). However, most published meta-analyses of CAR-T therapy in LBCL pool data across products, limiting product-specific interpretation. Methods: We conducted a systematic review and meta-analysis of clinical trials and retrospective real-world studies evaluating liso-cel monotherapy in R/R LBCL. The primary endpoint was the overall response rate (ORR). Secondary endpoints included complete response (CR), incidence of grade ≥ 3 adverse events, including cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS), overall mortality rate (OMR), disease progression-related mortality, and adverse event-related mortality. Pooled proportions were estimated using random-effects models. Results: Eleven studies including 1206 patients were analyzed, comprising five clinical trials and six real-world retrospective cohorts. The pooled ORR was 78%, and the pooled CR rate was 60%. The pooled OMR was 38%, with a disease progression-related mortality of 28% and an adverse event-related mortality of 4%. Severe (grade ≥ 3) CRS and ICANS occurred in 2% and 8%, respectively. Severe (grade ≥ 3) hematologic toxicities were frequent, particularly neutropenia, thrombocytopenia, and anemia. Conclusions: Liso-cel monotherapy demonstrated high pooled response rates and low pooled incidences of severe CRS and ICANS across clinical trials and real-world settings in R/R LBCL. Severe ICANS, although uncommon, remains clinically meaningful, and severe hematologic toxicities were frequent and warrant careful monitoring and supportive care. These findings provide product-specific benchmarks for liso-cel in R/R LBCL.