Les lymphomes de la zone marginale non malt découverts sur une hyperlymphocytose asymptomatique (un sous groupe d'évolution plus favorable?)

Résumé françaisDIJON-BU Médecine Pharmacie (212312103) / SudocSudocFranceF

Detection of the CALR mutation in the diagnosis of splanchnic vein thrombosis

International audienc

Impact de la décontamination de l’air par l’utilisation du système Plasmair® sur la survenue d’aspergilloses pulmonaires invasives chez des patients atteints de leucémies aiguës recevant des chimiothérapies intensives. Expérience du service d’hématologie clinique, CHU Dijon

National audienc

Prognostic value of postinduction medullary myeloid recovery by flow cytometry in acute myeloid leukemia

Abstract Risk stratification and treatment response evaluation are key features in acute myeloid leukemia (AML) management. Immunophenotypic and molecular approaches all rely on the detection of persisting leukemic cells by measurable residual disease techniques. A new approach is proposed here by assessing medullary myeloid maturation by flow cytometry through a myeloid progenitor ratio (MPR). The normal MPR range was defined using reference normal bone marrows (n = 48). MPR was considered balanced if between 1 and 4 and unbalanced if  4. MPR was retrospectively assessed at baseline and post‐induction for 206 newly diagnosed AML patients eligible for intensive treatment from two different French centers. All AML baseline MPR were unbalanced and thus significantly different from normal MPR (p < 0.0001). Patients with an unbalanced MPR after induction had worse 3‐year overall survival (OS) (44.4% vs. 80.2%, HR, 2.96; 95% CI, 1.81–4.84, p < 0.0001) and 3‐year relapse free survival (RFS) (38.7% vs. 64.4%, HR, 2.11; 95% CI, 1.39–3.18, p < 0.001). In multivariate analysis, postinduction unbalanced MPR was significantly associated with shorter OS and RFS regardless of the European LeukemiaNet 2010 risk stratification or NPM1/FLT3‐ITD status. A balanced postinduction MPR conversely conferred favorable outcomes and reflects medullary myeloid recovery

Interim 18F-FDG PET SUVmax Reduction Is Superior to Visual Analysis in Predicting Outcome Early in Hodgkin Lymphoma Patients.

International audience: PET performed after 2 cycles of chemotherapy (PET2) allows prediction of outcome in most patients with Hodgkin lymphoma (HL). Visual analysis using a 5-point scale was proposed to assess PET response, but a semiquantitative approach using maximum standardized uptake value (SUVmax) reduction between baseline and interim PET was shown to be superior to the 5-point scale in patients with diffuse large B-cell lymphoma and may also improve the accuracy of interim PET interpretation in HL. To compare the clinical usefulness of both methods in HL patients, we analyzed PET2 according to visual and ΔSUVmax criteria in a retrospective single-center study. METHODS: From 2007 to 2010, 59 consecutive patients with a first diagnosis of HL were treated with 4-8 cycles of anthracycline-based chemotherapy. Radiotherapy was performed in 14 responding patients with localized disease. PET was done at baseline (PET0) and after 2 cycles of chemotherapy, and treatment was not modified according to the PET2 result. PET2 was interpreted using the 5-point scale (positivity for score 4 or 5). The SUVmax reduction between PET0 and PET2 (ΔSUVmax) was computed for all patients, and patients with a ΔSUVmax greater than 71% were considered good responders. RESULTS: When the 5-point scale was used, 46 patients (78%) achieved a negative PET2 result, 7 of whom failed treatment (negative predictive value, 85%). Forty-nine patients (83%) had a ΔSUVmax greater than 71%, 6 of whom failed treatment (negative predictive value, 88%). The PET2 positive predictive value was significantly better for ΔSUVmax (70%) than for the 5-point scale (46%). When ΔSUVmax was used, 6 (46%) of the 13 PET2-positive patients could be reclassified as good responders. Although visual PET2 positivity was related to a lower 4-y progression-free survival (45%) compared with PET2 negativity (81%, P 71 vs ≤71%) was more accurate for identifying patients with different 4-y progression-free survivals (82% vs. 30%; P < 0.0001). In multivariate analysis using the international prognosis score and ΔSUVmax as covariates, ΔSUVmax remained the unique independent predictor for progression-free survival (P = 0.0001; relative risk, 8.1). CONCLUSION: Semiquantitative analysis was more accurate than visual analysis based on the 5-point scale to interpret PET2 and predict the outcome of HL patients. These encouraging results warrant further confirmation in larger and prospective series

The reversed halo sign : pathognomonic pattern of pulmonary mucormycosis in leukemic patients with neutropenia ?

Equipe EA MERSInternational audiencePulmonary mucormycosis (PM) is a life-threatening fungal infection with an increasing incidence among patients with acute leukemia. In some immunocompromised hosts, the reversed halo sign (RHS) has been described on the pulmonary computed tomographic (CT) scan of patients with mucormycosis. Methods. This study reports a single-center experience with PM exclusively in patients with acute leukemia. Clinical records, laboratory results, and CT scans were retrospectively analyzed to evaluate the clinical usefulness of the RHS for the early identification and treatment of PM, with regard to outcomes in these patients. Results. Between 2003 and 2012, 16 cases of proven PM were diagnosed among 752 consecutive patients receiving chemotherapy for acute myeloblastic or lymphoblastic leukemia. At the time PM was diagnosed, all patients but one were neutropenic. The study of sequential thoracic CT scans showed that during the first week of the disease, the RHS was observed in 15 of 16 patients (94%). Initially, other radiologic findings (multiple nodules and pleural effusion) were less frequent, but appeared later in the course of the disease (6% and 12% before vs 64% and 55% after the first week). After the diagnosis of PM, median overall survival was 25 weeks (range, 3-193 weeks), and 6 patients (38%) died before day 90. Conclusions. In the particular setting of neutropenic leukemia patients with pulmonary infection, the presence of the RHS on CT was a strong indicator of PM. It could allow the early initiation of appropriate therapy and thus improve the outcome

Evolution of procalcitonin, C-reactive protein and fibrinogen levels in neutropenic leukaemia patients with invasive pulmonary aspergillosis or mucormycosis

IF 2.332International audienceUnlike bacterial infections, the value of procalcitonin (PCT) in detecting fungal infections in leukaemia patients is not clear. To determine whether the monitoring of PCT coupled with C-reactive protein (CRP) and fibrinogen (Fib) could be helpful in the management of pulmonary aspergillosis (IPA) or mucormycosis (PM), we retrospectively analysed the evolution of PCT, CRP and Fib levels in 94 leukaemia patients with proven/probable IPA (n = 77) or PM (n = 17) from D-12 to D12 relative to IFI onset defined as D0. Overall, 2140 assays were performed. From D-12 to D0, 12%, 5% and 1.4% of patients had PCT >0.5, 1 and 1.5 mu g l(-1), respectively, while CRP was >50, 75 and 100 mg l(-1) in 84%, 70% and 57% and Fib was >4, 5 and 6 g l(-1) in 96%, 80% and 61% of cases respectively (P 1.5 mu g l(-1), while CRP >100 mg l(-1) and Fib >6 g l(-1) were observed in 80% and 75% of cases respectively (P < 10(-7)). In leukaemia patients, IPA or PM was accompanied by a significant increase in CRP and Fib while PCT remained low