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Walking a tightrope: clinical use of ibrutinib in mantle cell lymphoma in the elderly.

ABSTRACT: Representative clinical case. A 74-year-old male patient was diagnosed with stage 3 mantle cell lymphoma in 2012. Because he was ineligible for intensive treatment (age, previous myocardial infarction [MI]), he received rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) chemoimmunotherapy for 6 cycles (reaching complete response) and then rituximab maintenance (RM) for 2 years. One year after the end of RM, he relapsed with disseminated disease. He was started on ibrutinib 560 mg/day. Two weeks after the start of ibrutinib, he developed grade 3 diarrhea that required interruption of ibrutinib. Two weeks after the regular dose was restarted (month 3), the patient had repeated bleeding (patient was receiving aspirin for previous MI) and had to stop ibrutinib again. Because the patient was in partial response (PR) with lack of disease-associated symptoms, he was restarted on ibrutinib 280 mg/day with no further adverse events, and he had maintained PR at last follow-up (month 9 on ibrutinib).

SUBMITTER: Ruella M

PROVIDER: S-EPMC6142482 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature

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Walking a tightrope: clinical use of ibrutinib in mantle cell lymphoma in the elderly.

Ruella Marco M Soubeyran Pierre P

Hematology. American Society of Hematology. Education Program 20161201 1

Representative clinical case. A 74-year-old male patient was diagnosed with stage 3 mantle cell lymphoma in 2012. Because he was ineligible for intensive treatment (age, previous myocardial infarction [MI]), he received rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) chemoimmunotherapy for 6 cycles (reaching complete response) and then rituximab maintenance (RM) for 2 years. One year after the end of RM, he relapsed with disseminated disease. He was started on ...[more]

PMID: 27913512

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Project description:BACKGROUND:Bruton's tyrosine kinase (BTK) is a mediator of the B-cell-receptor signaling pathway implicated in the pathogenesis of B-cell cancers. In a phase 1 study, ibrutinib, a BTK inhibitor, showed antitumor activity in several types of non-Hodgkin's lymphoma, including mantle-cell lymphoma. METHODS:In this phase 2 study, we investigated oral ibrutinib, at a daily dose of 560 mg, in 111 patients with relapsed or refractory mantle-cell lymphoma. Patients were enrolled into two groups: those who had previously received at least 2 cycles of bortezomib therapy and those who had received less than 2 complete cycles of bortezomib or had received no prior bortezomib therapy. The primary end point was the overall response rate. Secondary end points were duration of response, progression-free survival, overall survival, and safety. RESULTS:The median age was 68 years, and 86% of patients had intermediate-risk or high-risk mantle-cell lymphoma according to clinical prognostic factors. Patients had received a median of three prior therapies. The most common treatment-related adverse events were mild or moderate diarrhea, fatigue, and nausea. Grade 3 or higher hematologic events were infrequent and included neutropenia (in 16% of patients), thrombocytopenia (in 11%), and anemia (in 10%). A response rate of 68% (75 patients) was observed, with a complete response rate of 21% and a partial response rate of 47%; prior treatment with bortezomib had no effect on the response rate. With an estimated median follow-up of 15.3 months, the estimated median response duration was 17.5 months (95% confidence interval [CI], 15.8 to not reached), the estimated median progression-free survival was 13.9 months (95% CI, 7.0 to not reached), and the median overall survival was not reached. The estimated rate of overall survival was 58% at 18 months. CONCLUSIONS:Ibrutinib shows durable single-agent efficacy in relapsed or refractory mantle-cell lymphoma. (Funded by Pharmacyclics and others; ClinicalTrials.gov number, NCT01236391.)

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Walking a tightrope: clinical use of ibrutinib in mantle cell lymphoma in the elderly.

Publications

Walking a tightrope: clinical use of ibrutinib in mantle cell lymphoma in the elderly.

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