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Even though HIV is associated with worse prognosis in many malignancies, the clinical course of myelodysplastic syndrome (MDS) in HIV + patients has not been well studied. Determining the clinical presentation and outcomes of MDS in these patients would be important for future diagnostic strategies, as anemia and other cytopenias are commonly seen in HIV + patients. Unique data mining software was used to identify cases of MDS or AML in adult patients who were also HIV + at Albert Einstein/Montefiore Medical Center between 1 January 2003 and 1 January 2017. Using Chi-Square and Fisher's exact test, characteristics of the HIV + MDS patients were compared to 135 HIV - MDS patients from the same institution diagnosed between 1997 and 2011. Fourteen biopsy proven MDS patients were identified with concomitant HIV. HIV + MDS patients presented at a younger age (59 vs. 71 yrs

Progressive multifocal leukoencephalopathy (PML) is a life-threatening opportunistic infection of immunomodulatory therapies. PML cases reported in PubMed (1995-2017) following stem-cell transplantation (HSCT) or chemoimmunotherapy (CIT) for hematologic malignancies were reviewed. We found 107 cases, 40% were HSCT recipients (32 allogeneic, 11 autologous) and 40% indolent lymphomas receiving monoclonal antibodies (mAbs). HSCT cases had longer time to PML diagnosis (10.8 vs. 4 months, p .001), higher proportion of PML therapy response (58% vs. 25%, p = .019), lower mortality rate (56% vs. 88%, p .001), and longer median survival (8 vs. 2 months, p .001). Outcome differences might be caused by selection bias as HSCT patients are most likely treated aggressively; however, time-dependent immune reconstitution might also contribute to their better prognosis. Increased use of mAbs and HSCT are associated with rising PML incidence in hematological malignancies, currently constituting the second largest vulnerable population after HIV-infected patients; further research is needed for its optimal treatment.