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Lee SF, Vellayappan BA, Wong LC, Chiang CL, Chan SK, Wan EYF, Wong ICK, Lambert PC, Rachet B, Ng AK, Luque-Fernandez MA. Cardiovascular diseases among diffuse large B-cell lymphoma long-term survivors in Asia: a multistate model study. ESMO Open 2022; 7:100363. [PMID: 35026723 PMCID: PMC8760397 DOI: 10.1016/j.esmoop.2021.100363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 11/26/2021] [Accepted: 12/03/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND We modeled the clinical course of a cohort of diffuse large B-cell lymphoma (DLBCL) patients with no prior cardiovascular diseases (CVDs) using a multistate modeling framework. PATIENTS AND METHODS Data on 2600 patients with DLBCL diagnosed between 2000 and 2018 and had received chemotherapy with or without radiotherapy were obtained from a population-wide electronic health database of Hong Kong. We used the Markov illness-death model to quantify the impact of doxorubicin and various risk factors (therapeutic exposure, demographic, comorbidities, cardiovascular risk factors, and lifestyle factors which included smoking) on the clinical course of DLBCL (transitions into incident CVD, lymphoma death, and other causes of death). RESULTS A total of 613 (23.6%) and 230 (8.8%) of 2600 subjects died of lymphoma and developed incident CVD, respectively. Median follow-up was 7.0 years (interquartile range 3.8-10.8 years). Older ages [hazard ratio (HR) for >75 versus ≤60 years 1.88; 95% confidence interval (CI) 1.25-2.82 and HR for 61-75 versus ≤60 years 1.60; 95% CI 1.12-2.30], hypertension (HR 4.92; 95% CI 2.61-9.26), diabetes (HR 1.43; 95% CI 1.09-1.87), and baseline use of aspirin (HR 5.30; 95% CI 3.93-7.16) were associated with an increased risk of incident CVD. In a subgroup of anticipated higher-risk patients (aged 61-75 years, smoked, had diabetes, and received doxorubicin), we found that they remained on average 7.9 (95% CI 7.2-8.8) years in the DLBCL state and 0.1 (95% CI 0.0-0.4) years in the CVD state, if they could be followed up for 10 years. The brief time in the CVD state is consistent with the high chance of death in patients who developed CVD. Other causes of death have overtaken DLBCL-related death after about 5 years. CONCLUSIONS In this Asian population-based cohort, we found that incident CVDs can occur soon after DLBCL treatment and continued to occur throughout survivorship. Clinicians are advised to balance the risks and benefits of treatment choices to minimize the risk of CVD.
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Affiliation(s)
- S F Lee
- Department of Clinical Oncology, The University of Hong Kong, Hong Kong; Department of Clinical Oncology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - B A Vellayappan
- Department of Radiation Oncology, National University Cancer Institute, Singapore
| | - L C Wong
- Department of Radiation Oncology, National University Cancer Institute, Singapore
| | - C L Chiang
- Department of Clinical Oncology, The University of Hong Kong, Hong Kong; Department of Clinical Oncology, Tuen Mun Hospital, New Territories West Cluster, Hospital Authority, Hong Kong
| | - S K Chan
- Department of Clinical Oncology, The University of Hong Kong, Hong Kong
| | - E Y-F Wan
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong; Department of Family Medicine and Primary Care, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong; Laboratory of Data Discovery for Health (D24H), Hong Kong Science and Technology Park, Sha Tin, Hong Kong
| | - I C-K Wong
- Centre for Safe Medication Practice and Research, Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong; Laboratory of Data Discovery for Health (D24H), Hong Kong Science and Technology Park, Sha Tin, Hong Kong; Research Department of Policy and Practice, School of Pharmacy, University College London, London, UK
| | - P C Lambert
- Biostatistics Research Group, Department of Health Sciences, University of Leicester, Leicester, UK; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - B Rachet
- Department of Non-Communicable Disease Epidemiology, ICON Group, London School of Hygiene and Tropical Medicine, London, UK
| | - A K Ng
- Department of Radiation Oncology, Brigham and Women's Hospital and Dana-Farber Cancer Institute, Harvard Medical School, Boston, USA
| | - M A Luque-Fernandez
- Department of Family Medicine and Primary Care, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong; Department of Non-Communicable Disease and Cancer Epidemiology, Instituto de Investigacion Biosanitaria de Granada (ibs.GRANADA), Andalusian School of Public Health, Granada, Spain.
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Vellayappan BA, Doody J, Vandervoort E, Szanto J, Sinclair J, Caudrelier JM, Malone S. Pre-operative versus post-operative radiosurgery for brain metastasis: Effects on treatment volume and inter-observer variability. J Radiosurg SBRT 2018; 5:89-97. [PMID: 29657889 PMCID: PMC5893459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 12/08/2017] [Indexed: 06/08/2023]
Abstract
PURPOSE/OBJECTIVES Compared to post-operative whole brain radiotherapy, resection cavity radiosurgery reduces impact on neuro-cognitive function and improves quality-of-life. However, coverage of the operative tract, in addition to tumour bed, may lead to large treatment volumes and inter-observer variability. We hypothesized that pre-operative radiosurgery reduces target volume size and inter-observer variability compared to post-operative radiosurgery. MATERIALS/METHODS We identified 10 consecutive patients, with solitary brain metastasis, treated with post-operative cavity radiosurgery.Pre- and post-operative axial T1 contrast MRI were co-registered with the planning CT scans. Three radiation oncologists independently contoured the target volumes on the pre- and post-operative imaging. A 2mm-PTV margin was utilized for both strategies and radiosurgery treatment plans were generated. The following parameters were evaluated in the 2 plans: Mean target volume (cc), 50% isodose volume (cc), Inter-observer variability (Jaccard Index JI) and Conformity Index (CI). RESULTS There was no significant difference in the mean target volume, nor 50% isodose volume, between pre- and post-operative strategies. (17.6 (95% CI 9.98 - 25.22) versus 19.4 (95% CI 10.11 - 28.69) cc, P=0.80; 61.7 (95% CI 38.4 - 85.0) vs 77.7 (95% CI 34.94 - 120.46) cc, P=0.65). There was significantly less inter-observer variability and improved conformity in the pre-operative group (Mean JI 0.84(95% CI 0.82 - 0.86) versus 0.70 (95% CI 0.62 - 0.78), P = 0.005; Mean CI 1.32 (95% CI 1.26 - 1.38) vs 1.45 (95% CI 1.36 - 1.54), P= 0.01). Planned subgroup analysis did not reveal any significant difference (between pre- vs post-op) in the mean volume of cystic versus non-cystic metastasis. Deep lesions (>2.5cm from dura) had a larger post-operative target volume (25.8 (95% CI 15.1 - 36.5) vs 12.3 (95% CI 6.54 - 18.06) cc, P=0.06) compared to superficial lesions. CONCLUSION Pre-operative radiosurgery has less inter-observer variability and improved plan conformity. However, there was no difference in mean target volume between the pre- versus post-operative radiation. Contouring guidelines, and peer review, may help to reduce inter-observer variability for cavity radiosurgery.
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Affiliation(s)
- BA Vellayappan
- Radiation Oncology, National University Cancer Institute Singapore, National University of Singapore, Singapore
| | - J Doody
- Radiation Medicine Program, The Ottawa Hospital Cancer Centre, Canada
| | - E Vandervoort
- Radiation Medicine Program, The Ottawa Hospital Cancer Centre, Canada
| | - J Szanto
- Radiation Medicine Program, The Ottawa Hospital Cancer Centre, Canada
| | - J Sinclair
- Division of Neurosurgery, The Ottawa Hospital, Ottawa, Canada
| | - JM Caudrelier
- Radiation Medicine Program, The Ottawa Hospital Cancer Centre, Canada
| | - S Malone
- Radiation Medicine Program, The Ottawa Hospital Cancer Centre, Canada
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Lee CH, Gu HZ, Vellayappan BA, Tan CH. Water as neutral oral contrast agent in abdominopelvic CT: comparing effectiveness with Gastrografin in the same patient. Med J Malaysia 2016; 71:322-327. [PMID: 28087955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
INTRODUCTION Positive oral contrast is no longer deemed necessary for abdominopelvic computed tomography (CT) scans. Studies have shown water to be an equally effective oral contrast agent. However, to our knowledge no study has compared effectiveness between gastrografin and water in the same patient, which will provide a more objective evaluation of the two oral contrast agents. We aim to make a head-to-head comparison of water as neutral oral contrast (OC) against gastrografin as positive OC for abdominopelvic CT scans in the same patient. METHODS A retrospective review of 206 abdominopelvic CT scans of 103 patients was performed. The scans were reviewed in consensus by two blinded radiologists. The ability to visualise each abdominopelvic organ, contrastassociated artefacts and small bowel wall delineation, was qualitatively scored on a 5-point scale. Each patient had two sets of scores, one with water and another with gastrografin as OC. Paired scores from the two OCs were evaluated by Wilcoxon signed rank test to determine any significant difference in performance between the two OCs for visualisation of abdominopelvic anatomy on CT. RESULTS There was significantly better delineation of duodenal wall (p<0.001) and overall visualisation of the duodenum (p=0.011) using water as OC compared to gastrografin. No statistically significant differences were demonstrated between water and gastrografin for visualisation of the rest of the abdominopelvic organs, walldelineation of the rest small bowel and contrast-associated artefacts. CONCLUSIONS Water can be used in place of gastrografin as oral contrast in abdominopelvic CT without compromising visualization of abdominopelvic organs.
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Affiliation(s)
- C H Lee
- Tan Tock Seng Hospital, Department of Radiology, 11 Jalan Tan Tock Seng, Singapore, 308433 Singapore.
| | - H Z Gu
- Ministry of Health Holdings, Singapore
| | - B A Vellayappan
- National University Hospital, National University Cancer Institute Singapore, Singapore
| | - C H Tan
- Tan Tock Seng Hospital, Department of Radiology, 11 Jalan Tan Tock Seng, Singapore, 308433 Singapore
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Vellayappan BA, Tiong HY, Chua WJ, Consigliere DT. Seminal vesicle calculus after transurethral resection of ejaculatory duct. Can J Urol 2007; 14:3595-7. [PMID: 17594754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
We report a case of symptomatic seminal vesicle calculus following transurethral resection of ejaculatory duct. A 37-year-old male, who had previously undergone transurethral resection of ejaculatory duct, presented with perineal discomfort and graveluria. Computed tomography revealed a calculus situated within a dilated left seminal vesicle. The patient was treated with cystoscopy and litholapaxy of the seminal vesicle calculus. Although rare, our case demonstrates that seminal vesicle calculi formation can occur following treatment of ejaculatory duct obstruction, possibly secondary to urinary reflux and stasis.
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Affiliation(s)
- B A Vellayappan
- Department of Urology, National University Hospital of Singapore, Singapore
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