5篇
您的检索式：作者名="Ruwan Perera"
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| 1 | Neoadjuvant Therapy for Rectal Cancer Down-Stages the Tumor but Reduces Lymph Node Harvest Significantly显示文摘 | Ruwan E. Wijesuriya Kemal I. Deen Janaki Hewavisenthi Jayantha Balawardana Mahendra Perera | 2005 | Surgery Today2005，，6： | 1 |
| 2 | Blast and residual capacity analysis of reinforced concrete framed buildings显示文摘 | Ruwan Jayasooriya David P. Thambiratnam Nimal J. Perera Vladis Kosse | 2011 | Engineering Structures2011，，： | 1 |
| 3 | Neoadjuvant Therapy for Rectal Cancer Down-Stages the Tumor but Reduces Lymph Node Harvest Significantly显示文摘 | Ruwan E. Wijesuriya Kemal I. Deen Janaki Hewavisenthi Jayantha Balawardana Mahendra Perera | 2005 | Surgery Today2005，，6： | 1 |
| 4 | Tunneled biopsy is an underutilised,simple,safe and efficient method for tissue acquisition from subepithelial tumours显示文摘BACKGROUND Tissue acquisition from subepithelial lesions is often attempted by endoscopic ultrasound(EUS)-sampling as conventional endoscopic biopsy usually fails to reach deeper layers of the gastrointestinal wall.AIM To investigate the utilisation,safety and diagnostic yield of an intensified“biteon-bite”tunnel biopsy technique.METHODS In this retrospective cohort study,all patients presenting with subepithelial masses in the upper gastrointestinal tract from March 2013 to July 2019 were included.Data were analysed for size and location of the subepithelial mass,use of intensified tunnel biopsy protocol(more than 10 double bite-on-bite biopsies)or superficial conventional biopsies,histology and imaging results,occurrence of readmission and adverse events after endoscopy.RESULTS Two hundred and twenty-nine patients with subepithelial lesions were included.Superficial conventional biopsies were taken in 117 patients and were diagnostic only in one lipoma(0.9%).Tunnel biopsies taken in 112/229(48.9%)patients were significantly more likely to provide histological diagnosis(53.6%;P<0.001).For lesions≥10mm the diagnostic yield of tunnel biopsies further increased to 41/67(61.2%).No immediate or delayed complications were reported.Only 8 of the 51 endoscopists(15.7%)regularly attempted tunnel biopsies.CONCLUSION Tunnel biopsy is a simple,safe and efficient but underutilised diagnostic modality for tissue acquisition in subepithelial masses.It should be routinely attempted at the initial endoscopy. | Andreas Koutsoumpas Ruwan Perera Adele Melton Jonathan Kuker Tilak Ghosh Barbara Braden | 2021 | World Journal of Clinical Cases2021，9，21： | 0 |
| 5 | Proximal and distal rectal cancers differ in curative resectability and local recurrence显示文摘AIM: To evaluate patients with proximal rectal cancer (PRC) (> 6 cm up to 12 cm) and distal rectal cancer (DRC) (0 to 6 cm from the anal verge). METHODS: Two hundred and eighteen patients (120 male, 98 female, median age 58 years, range 19-88 years) comprised 100 with PRC and 118 with DRC. The proportion of T1, T2 vs T3, T4 stage cancers was similar in both groups (PRC: T1+T2 = 29%; T3+T4 = 71% and DRC: T1+T2 = -31%; T3+T4 = 69%). All patients had cancer confined to the rectum -those with synchronous distant metastasis were excluded. Surgical resection was with curative intent with or without pre-operative chemoradiation (c-RT). Follow-up was for a median of 35 mo (range: 12 to 126 mo). End points were: 30 d mortality, complications of operation, microscopic tumour-free margins, resection with a tumour-free circumferential margin (CRM) of 1 to 2 mm and > 2 mm, local recurrence, survival and the permanent stoma rate. RESULTS: Overall 30-d mortality was 6% (12): PRC 7 % and DRC 4%. Postoperative complications occurred in 14% with PRC compared with 21.5% with DRC, urinary retention was the complication most frequently reported (PRC 2% vs DRC 9%, P = 0.04). Twelve percent with PRC compared with 37% with DRC were subjected to preoperative c-RT (P = 0.03). A tumour-free CRM of 1 to 2 mm and > 2 mm was reported in 93% and 82% with PRC and 88% and 75% with DRC respectively (PRC vs DRC, P > 0.05). However, local recurrence was 5% for PRC vs 11% for DRC (P < 0.001). Three and five years survival was 65.6% and 60.2% for PRC vs 67% and 64.3% for DRC respectively. No patient with PRC and 23 (20%) with DRC received an abdomino-perineal resection. CONCLUSION: PRC and DRC differ in the rate of abdomino-perineal resection, post-operative urinary retention and local recurrence. Survival in both groups was similar. | Wasantha Wijenayake Mahendra Perera Jayantha Balawardena Raeed Deen S Ruwan Wijesuriya Sumudu K Kumarage Kemal I Deen | 2011 | World Journal of Gastrointestinal Surgery2011，3，8： | 0 |
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