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Summary: Hodgkin variant Richter transformation (HvRT) is a rare and challenging complication of chronic lymphocytic leukaemia (CLL) for which information on prognostic factors and treatment approaches remain limited. We analysed characteristics and survival outcomes of a population‐based cohort of 32 patients with HvRT identified in British Columbia over a 40‐year period. Median interval from CLL diagnosis to HvRT was 5.6 years (range, 0–33.6), with five cases diagnosed concurrently. Most patients (80%) had treatment for CLL prior to HvRT. Median age at HvRT was 71 years (range, 51–86) and the majority of patients had high‐risk disease, including stage 3–4 in 87% and International Prognostic Score (IPS) ≥ 4 in 65%. Two‐year progression‐free (PFS) and overall survival (OS) from HvRT were 47% (95% CI: 29%–64%) and 57% (95% CI: 38%–72%), respectively. OS from HvRT was significantly worse in those with anaemia (p = 0.02), elevated lactate dehydrogenase (p = 0.04), high IPS (p = 0.04), and worse performance status (p = 0.001). For those treated with curative‐intent ABVD/ABVD‐like therapy, 2‐year PFS and OS were 70% (95% CI: 45%–85%) and 74% (95% CI: 49%–89%), respectively. In this real‐world population‐based cohort, HvRT was associated with poor clinical outcomes overall; however, those able to tolerate curative‐intent therapy had similar survival to older patients with de novo HL. [ABSTRACT FROM AUTHOR]

Objectives: Acute myeloid leukaemia (AML) is a disease of older adults, who are vulnerable to socio‐economic factors. We determined AML incidence in older adults and the impact of socio‐economic factors on outcomes. Methods: We included 3024 AML patients (1996–2016) identified from a population‐based registry. Results: AML incidence in patients ≥60 years increased from 11.01 (2001–2005) to 12.76 (2011–2016) per 100 000 population. Among 879 patients ≥60 years in recent eras (2010–2016), rural residents (<100 000 population) were less likely to be assessed by a leukaemia specialist (39% rural, 47% urban, p =.032); no difference was seen for lower (43%, quintile 1–3) vs. higher (47%, quintile 4–5) incomes (p =.235). Similar numbers received induction chemotherapy between residence (16% rural, 18% urban, p =.578) and incomes (17% lower, 17% high, p = 1.0). Differences between incomes were seen for hypomethylating agent treatment (14% low, 20% high, p =.041); this was not seen for residence (13% rural, 18% urban, p =.092). Among non‐adverse karyotype patients ≥70 years, 2‐year overall survival was worse for rural (5% rural, 12% urban, p =.006) and lower income (6% low, 15% high, p =.017) patients. Conclusions: AML incidence in older adults is increasing, and outcomes are worse for older rural and low‐income residents; these patients face treatment barriers. [ABSTRACT FROM AUTHOR]

Summary: Treatment of Burkitt lymphoma (BL) with intensive, multi‐agent chemotherapy with aggressive central nervous system (CNS) prophylaxis results in high cure rates, although no regimen is standard of care. We examined population‐based survival outcomes of adults with BL treated with a modified combination of cyclophosphamide, vincristine, doxorubicin, prednisone and systemic high‐dose methotrexate (MTX) (CODOX‐M) with IVAC (ifosfamide, mesna, etoposide, cytarabine and intrathecal MTX) (CODOX‐M/IVAC) ± rituximab over a 15‐year period in British Columbia. For the 81 patients identified (including 8 with CNS involvement and 18 with human immunodeficiency virus‐associated BL), 5‐year progression‐free survival (PFS) and overall survival (OS) were 75% [95% confidence interval (CI): 63–83%] and 77% (95% CI: 66–85%), respectively, with no treatment‐related deaths. Those who completed the regimen per protocol (n = 38) had significantly improved 5‐year PFS 86% (P = 0·04) and OS 92% (P = 0·008), as did those under 60 years with 5‐year PFS 82% (P = 0·005) and OS 86% (P = 0·002), which remained significant in multivariate analysis [PFS: hazard ratio (HR) 3·36, P = 0·018; OS HR 4·03, P = 0·012]. Incorporation of high‐dose systemic methotrexate also significantly affected multivariate survival outcomes (OS HR 0·28, P = 0·025). Stem cell transplant in first remission had no effect on OS or PFS. This large, real‐world analysis of BL patients treated with CODOX‐M/IVAC ± rituximab demonstrates excellent survival outcomes comparable to clinical trials. These results help to serve as a benchmark when comparing curative therapies for BL patients as novel regimens are incorporated into clinical practice. [ABSTRACT FROM AUTHOR]

The curative potential of allogeneic haematopoietic stem cell transplant (allo HSCT) in chronic lymphocytic leukaemia CLL is established, with a demonstrated role for graft-versus-leukaemia and less certainty for other factors in determining outcome. The first two decades of CLL patients proceeding to allo HSCT at the Leukaemia/Bone Marrow Transplant Program of British Columbia ( n = 49 consecutive, 1991-2009) were studied to clarify factors predicting outcome. The donor was related in 29 (59%) and unrelated in 20 (41%). Conditioning was reduced-intensity in 27 (55%) and myeloablative in 22 (45%). Thirty-one of 49 patients survive with median follow-up of 5 years (0·2-15). Cumulative incidence of non-relapse mortality; complete remission ( CR); clearance of fluorescence in situ hybridization ( FISH) abnormality and progression at 10 years was 36%; 69%; 55% and 22%. Overall survival ( OS) was 63% at 2 years; 55% at 5 years and beyond. Factors predicting OS ( P value by log rank <0·05) were: comorbidity index <3, FISH rank (Dohner) and 17p deletion, alemtuzumab pre- HSCT, achievement of CR post- HSCT, donor chimerism >90%, clearance of FISH abnormality post- HSCT and absence of high-grade (3-4) graft-versus-host disease. Results from this province-wide, two-decade cohort demonstrated that a substantial proportion of patients with high-risk CLL become long term disease-free survivors. [ABSTRACT FROM AUTHOR]

High dose chemoradiotherapy and haematopoietic stem cell transplantation (SCT) is used as primary therapy for patients diagnosed with Burkitt lymphoma (BL). Forty-three adults presented with sporadic BL in British Columbia between 1987 and 2003. Twenty patients had bone marrow involvement. Sixteen patients did not proceed to SCT because of chemorefractory disease ( n = 9) or other reasons ( n = 7). Twenty-seven patients proceeded to SCT and had a 3-year event-free survival of 51%. In conclusion, approximately 50% of patients with chemosensitive BL who undergo SCT can be cured; however, a significant number of patients will not proceed to SCT because of early resistance or recurrence. [ABSTRACT FROM AUTHOR]

Forty-four patients with relapsed or refractory aggressive histology non-Hodgkin lymphoma (NHL) (diffuse large B cell, n = 23; peripheral T cell, n = 5; transformed B cell, n = 16) proceeded to allogeneic stem cell transplant (allo-SCT) between 1987 and 2003. Median age at transplant was 40 years (range 19–56 years). At the time of transplant, 35 were chemosensitive and nine were chemorefractory. Thirty-three patients had matched sibling donors and 11 had unrelated donors. Forty-two patients (95%) received radiation-based conditioning regimens. Event-free survival (EFS) and overall survival (OS) at 5 years was 43% [95% confidence interval (CI): 27–58%] and 48% (95% CI: 32–63%) respectively. Treatment-related mortality was 25% at 1 year. Grade III–IV acute graft- versus-host disease (GVHD) was the only significant variable affecting OS and EFS, and had a negative impact. Chronic GVHD did not influence survival. Lymphoma relapse <12 months after initial therapy predicted for increased risk of relapse post-transplant ( P = 0·02). Patients with chemorefractory lymphoma were not at increased risk of relapse ( P = 0·20) with four of nine patients remaining alive without disease 12–103 months post-transplant. In conclusion, allo-SCT for relapsed or refractory aggressive histology NHL results in long-term EFS and OS of 40–50%. Patients with chemorefractory disease can have a durable remission post-transplant. [ABSTRACT FROM AUTHOR]

Myeloablative allogeneic bone marrow transplantation (BMT) may be curative in patients with follicular non-Hodgkin's lymphoma, however, the impact of this therapy on long-term survival, disease progression and functional status is less clear. Twenty-nine patients (median age 42 years, range: 20–53) with advanced stage follicular lymphoma proceeded to allogeneic BMT a median of 25 (range: 8–154) months postdiagnosis, between 1985 and 2001, and have been followed for a minimum of 2 years. Eleven of 29 (38%) had refractory disease (n = 5 induction failure,n = 6 resistant relapse). Most (27 of 29, 93%) received total body irradiation-based conditioning; stem cell source was marrow from a related donor (n = 20) or unrelated donor (n = 9). Seventeen of 29 patients (59%) were alive a median of 5 years (range: 2–11) post-BMT with a median Karnofsky Performance Score of 100%. Death occurred because of transplant complications in seven patients (cumulative incidence of non-relapse mortality 24%), and progressive lymphoma in five patients (cumulative incidence of refractory/recurrent lymphoma 23%). The 5-year probability of overall and event-free survival was 58% and 53% respectively. Allogeneic BMT has resulted in long-term disease-free survival for approximately 50% of this cohort of patients with advanced follicular lymphoma and most of them now enjoy robust health. [ABSTRACT FROM AUTHOR]