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Pancreatic Neoplasms: HELP
Articles by Samuel Y. Ngan
Based on 3 articles published since 2008

Between 2008 and 2019, S. Ngan wrote the following 3 articles about Pancreatic Neoplasms.
+ Citations + Abstracts
1 Clinical Trial A phase I trial of Capecitabine+Gemcitabine with radical radiation for locally advanced pancreatic cancer. 2009

Michael, M / Price, T / Ngan, S Y / Ganju, V / Strickland, A H / Muller, A / Khamly, K / Milner, A D / Dilulio, J / Matera, A / Zalcberg, J R / Leong, T. ·Division of Haematology and Medical Oncology, Peter MacCallum Cancer Centre, Locked Bag 1, A'Beckett Street, Melbourne, Victoria 8006, Australia. Michael.Michael@petermac.org ·Br J Cancer · Pubmed #19088724.

ABSTRACT: Standard chemoradiotherapy with infusional 5FU for locally advanced pancreatic cancer (LAPC) has limited efficacy in this disease. The combination of Capecitabine (Cap) and Gemcitabine (Gem) are synergistic and are potent radiosensitisers. The aim of this phase I trial was thus to determine the highest administered dose of the Cap plus Gem combination with radical radiotherapy (RT) for LAPC. Patients had LAPC, adequate organ function, ECOG PS 0-1. During RT, Gem was escalated from 20-50 mg m(-2) day(-1) (twice per week), and Cap 800-2000 mg m(-2) day(-1) (b.i.d, days 1-5 of each week). Radiotherapy 50.4 Gy/28 fractions/5.5 weeks, using 3D-conformal techniques. Three patients were entered to each dose level (DL). Dose-limiting toxicity(s) (DLTs) were based on treatment-related toxicities. Twenty patients were accrued. Dose level (DL) 1: Cap/Gem; 800/20 mg m(-2) day(-1) (3 patients), DL2: 1000/20 (12 patients), DL3: 1300/30 (5 patients). Dose-limiting toxicities were observed in DL3; grade 3 dehydration (1 patient) and grade 3 diarrhoea and dehydration (1 patient). Dose level 2 was the recommend phase 2 dose. Disease control rate was 75%: PR=15%, SD=60%. Median overall survival was 11.2 months. The addition of Cap and Gem to radical RT was feasible and active and achieved at relatively low doses.

2 Clinical Trial Accrediting radiation technique in a multicentre trial of chemoradiation for pancreatic cancer. 2008

Spry, N / Bydder, S / Harvey, J / Borg, M / Ngan, S / Millar, J / Graham, P / Zissiadis, Y / Kneebone, A / Ebert, M. ·Department of Radiation Oncology, Sir Charles Gairdner Hospital, Nedlands, Australia. ·J Med Imaging Radiat Oncol · Pubmed #19178636.

ABSTRACT: Before a multicentre trial of 3-D conformal radiotherapy to treat cancer of the pancreas, participating clinicians were asked to complete an accreditation exercise. This involved planning two test cases according to the study protocol, then returning hard copies of the plans and dosimetric data for review. Any radiation technique that achieved the specified constraints was allowed. Eighteen treatment plans were assessed. Seven plans were prescribed incorrect doses and two of the planning target volumes did not comply with protocol guidelines. All plans met predefined normal tissue dose constraints. The identified errors were attributable to unforeseen ambiguities in protocol documentation. They were addressed by feedback and corresponding amendments to protocol documentation. Summary radiobiological measures including total weighted normal tissue equivalent uniform dose varied significantly between centres. This accreditation exercise successfully identified significant potential sources of protocol violations, which were then easily corrected. We believe that this process should be applied to all clinical trials involving radiotherapy. Due to the limitations of data analysis with hard-copy information only, it is recommended that complete planning datasets from treatment-planning systems be collected through a digital submission process.

3 Clinical Trial 3D radiotherapy can be safely combined with sandwich systemic gemcitabine chemotherapy in the management of pancreatic cancer: factors influencing outcome. 2008

Spry, Nigel / Harvey, Jennifer / Macleod, Craig / Borg, Martin / Ngan, Samuel Y / Millar, Jeremy L / Graham, Peter / Zissiadis, Yvonne / Kneebone, Andrew / Carroll, Susan / Davies, Terri / Reece, William H H / Iacopetta, Barry / Goldstein, David. ·Department of Radiation Oncology, Sir Charles Gairdner Hospital, Nedlands, WA, Australia. Nigel.Spry@health.wa.gov.au ·Int J Radiat Oncol Biol Phys · Pubmed #18164859.

ABSTRACT: PURPOSE: The aim of this Phase II study was to examine whether concurrent continuous infusion 5-fluorouracil (CI 5FU) plus three-dimensional conformal planning radiotherapy sandwiched between gemcitabine chemotherapy is effective, tolerable, and safe in the management of pancreatic cancer. METHODS AND MATERIALS: Patients were enrolled in two strata: (1) resected pancreatic cancer at high risk of local relapse (postsurgery arm, n = 22) or (2) inoperable pancreatic cancer in head or body without metastases (locally advanced arm, n = 41). Gemcitabine was given at 1,000 mg/m(2) weekly for 3 weeks followed by 1 week rest then 5-6 weeks of radiotherapy and concurrent CI 5FU (200 mg/m(2)/day). After 4 weeks' rest, gemcitabine treatment was reinitiated for 12 weeks. RESULTS: For the two arms combined, treatment-related Grade 3 and 4 toxicities were reported by 25 (39.7%) and 7 (11.1%) patients, respectively. No significant late renal or hepatic toxicity was observed. In the postsurgery arm (R1 54.5%), median time to progressive disease from surgery was 11.0 months, median time to failure of local control was 32.9 months, and median survival time was 15.6 months. The 1- and 2-year survival rates were 63.6% and 31.8%. No significant associations between outcome and mutations in K-ras or TP53 or microsatellite instability were identified. Post hoc investigation of cancer antigen 19-9 levels found baseline levels and increases postbaseline were associated with shorter survival (p = 0.0061 and p < 0.0001, respectively). CONCLUSIONS: This three-dimensional chemoradiotherapy regimen is safe and promising, with encouraging local control for a substantial proportion of patients, and merits testing in a randomized trial.