Publications by authors named "Kumana C"

The Acute Promyelocytic Leukemia Asian Consortium analyzed a contemporaneous cohort of newly-diagnosed APL patients treated with and without frontline arsenic trioxide (ATO) in six centers. The objectives were to define the impact of ATO on early deaths and relapses, and its optimal positioning in the overall treatment strategy. In a 21.

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Background: The epidemiology and treatment of acute promyelocytic leukaemia (APL) are changing. We have incorporated oral arsenic trioxide (oral-ATO) into induction/maintenance.

Methods: Newly-diagnosed APL from 1991 to 2021 divided into three 10-year periods were studied to define its epidemiology and how oral-ATO impacted on its outcome.

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This account describes how orally administered Arsenic-trioxide (ATO) therapy influences the epidemiology of acute promyelocytic leukaemia (APL), and how the experience that ensued may expand the indications for oral ATO as a treatment for diseases/disorders other than APL. Over the last two decades, experience with APL patients in Hong Kong treated with an oral regimen comprising ATO, all-trans retinoic acid (ATRA), and ascorbic acid (also known as "AAA") has confirmed a dramatic improvement in overall survival. Over that period, there has been an estimated 60-fold increase in the prevalence of APL (proportion of surviving APL patients in the population on December 31 including those deemed to be 'cured').

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Appreciation of the properties of arsenic trioxide (ATO) has redefined the treatment landscape for acute promyelocytic leukaemia (APL) and offers promise as a treatment for numerous other diseases. The benefits of ATO in patients with APL is related to its ability to counteract the effects of PML::RARA, an oncoprotein that is invariably detected in the blood or bone marrow of affected individuals. The PML::RARA oncoprotein is degraded specifically by binding to ATO.

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Article Synopsis
  • Early death (ED) is a significant issue in acute promyelocytic leukemia (APL), occurring in 16% of newly diagnosed patients in a study conducted in Hong Kong from 2007 to 2020.
  • Factors linked to increased risk of ED include male sex, high leukocyte counts, low fibrinogen levels, and delayed administration of all-trans retinoic acid (ATRA) beyond 24 hours after admission.
  • The study highlighted that early ATRA treatment and addressing blood clotting issues are crucial for improving survival rates, with overall survival rates rising significantly when early deaths are excluded.
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Various forms of arsenic were used in China and elsewhere for over 5,000 years. Following the initial success of intravenous arsenic trioxide (i.v.

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Background: The role of arsenic trioxide (As O ) in the maintenance of first complete remission (CR1) in acute promyelocytic leukemia (APL) is unclear.

Methods: A total of 129 consecutive adult patients with APL of all risk categories who achieved CR1 with conventional induction (all-trans retinoic acid [ATRA]/daunorubicin) and consolidation (daunorubicin/cytarabine [induction daunorubicin and consolidation omitted for age ≥70 years]) underwent maintenance comprising ATRA (45 mg/m /day), oral As O (10 mg/day), and ascorbic acid (1 g/day) (AAA) for 2 weeks every 2 months for 2 years.

Results: Over a 17-year period from August 1, 2002, to July 31, 2019, 63 men and 66 women (median age, 46 years [range, 18-82 years]) received AAA maintenance, which was already completed in 117 patients.

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Background: Strategies using oral arsenic trioxide (As O ) are efficacious in relapsed acute promyelocytic leukemia (APL), but they have not been examined in newly diagnosed cases.

Methods: Sixty-two consecutive patients (24 men and 38 women) with a median age of 52 years (range, 22-85 years), 36% of whom had high-risk features, underwent induction with all-trans retinoic acid at 45 mg/m /d, oral As O at 10 mg/d, and ascorbic acid at 1 g/d (the all-trans retinoic acid-arsenic trioxide-ascorbic acid [AAA] regimen) for 6 weeks (with patients younger than 70 years additionally receiving daunorubicin at 50 mg/m /d × 3); they then underwent consolidation with 2 monthly cycles of daunorubicin (50 mg/m /d × 2) and cytarabine (100 mg/m /d × 5) and received AAA maintenance (2 weeks every 8 weeks) for 2 years. A contemporaneous cohort of 37 newly diagnosed patients (15 men and 22 women) with a median age of 51 years (range, 23-78 years), not consenting to oral As O induction but receiving similar induction, consolidation, and AAA maintenance, served as a comparator group; 46% of these patients had high-risk features.

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Background: For patients who have acute promyelocytic leukemia (APL) in second complete remission (CR2), optimal postremission strategies remain undefined.

Methods: The role of an oral arsenic trioxide (As O )-based regimen in the management of patients who had APL in CR2 was examined.

Results: Seventy-three patients with APL in first relapse (R1) were studied.

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Background: Randomized controlled trials (RCTs) directly comparing cardiovascular outcomes of new antidiabetic drugs are lacking. We used network meta-analysis to compare new antidiabetic drug classes with respect to major adverse cardiovascular events (MACE) and mortality.

Methods: We searched MEDLINE, EMBASE, the Cochrane database, and ClinicalTrials.

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Background And Objectives: Benefits and/or harms (including costs) of non-vitamin K oral anticoagulants (NOACs) versus warfarin therapy need appreciation in relative and absolute terms.

Methods: Accordingly, we derived clinically relevant relative and absolute benefit/harm parameters for NOACs (apixaban, dabigatran, rivaroxaban, edoxaban) compared to warfarin from four clinical trials involving atrial fibrillation (AF) patients. For each trial, we tabulated patient numbers enduring four important outcomes and calculated unadjusted relative risk reduction (RRR) and number needed to treat (NNT)/year values (and 95% confidence intervals) for the NAOC compared to warfarin.

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Patients receive dual antiplatelet therapy (DAPT) for 6-12 months after drug-eluting stents (DES) implantation. The efficacy and safety of prolonged DAPT has been questioned. Therefore, we performed a meta-analysis on randomised trials comparing different DAPT durations.

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Objective: To assess the utility of remote-sensing infrared thermography as a screening tool for fever.

Design: Cross-sectional study comparing body temperatures measured by remote-sensing infrared thermography (maximum for frontal, forehead, or lateral views) with core temperatures measured by aural or oral methods.

Setting: Accident and Emergency Department, Queen Mary Hospital, Hong Kong.

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Seventy-six patients with acute promyelocytic leukemia (APL) in first complete remission after induction and consolidation by daunorubicin and cytosine arabinoside received oral arsenic trioxide (As(2)O(3))-based maintenance. Three regimens were used: oral As(2)O(3) (10 mg/day, regimen A, n = 20), oral As(2)O(3) plus all-trans retinoic acid (ATRA, 45 mg/m(2) per day, regimen AA, n = 19), and oral As(2)O(3) plus ATRA plus ascorbic acid (1000 mg/day, regimen AAA, n = 37), each given for 2 weeks every 2 months for 2 years. Patients receiving A, AA, and AAA maintenance did not differ significantly in clinicopathologic features and risk factors.

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Evaluation of: Taylor AJ, Villines TC, Stanek EJ et al. Extended-release niacin or ezetimibe and carotid intima-media thickness. N.

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Aspects of general medicine.

Hong Kong Med J

October 2008

Horizons in Medicine is a series produced annually by the Royal College of Physicians. Volume 19 is based on their Advanced Medicine Conference held in 2007 and offers updates on a wide range of topics in clinical medicine. This 'review of reviews' covers developments described in a selection of chapters.

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