SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Mahteme Haile) "

Sökning: WFRF:(Mahteme Haile)

  • Resultat 21-30 av 68
  • Föregående 12[3]4567Nästa
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
21.
  • Bjersand, Kathrine, et al. (författare)
  • Drug Sensitivity Testing in Cytoreductive Surgery and Intraperitoneal Chemotherapy of Pseudomyxoma Peritonei
  • 2015
  • Ingår i: ; 22, s. S810-S816
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Cytoreductive surgery (CRS) and intraperitoneal chemotherapy (IPC) is an established therapy for pseudomyxoma peritonei (PMP). However, the role of IPC is unclear. By ex vivo assessment of PMP tumor cell sensitivity to cytotoxic drugs, we investigated the basis for IPC drug selection and the role of IPC in the management of PMP.METHODS: Tumor cells were prepared by collagenase digestion of tumor tissue from 133 PMP patients planned for CRS and IPC. Tumor cell sensitivity to oxaliplatin, 5FU, mitomycin C, doxorubicin, irinotecan, and cisplatin was assessed in a 72-h cell-viability assay. Drug sensitivity was correlated to progression-free survival (PFS) and overall survival (OS).RESULTS: Samples from 92 patients were analyzed successfully. Drug sensitivity varied considerably between samples. Peritoneal mucinous carcinomatosis (PMCA), compared with PMCA intermediate or disseminated peritoneal adenomucinosis, was slightly more resistant to platinum and 5FU and tumor cells from patients previously treated with chemotherapy were generally less sensitive than those from untreated patients. Multivariate analysis showed patient performance status and completeness of CRS to be prognostic for OS. Among patients with complete CRS (n = 61), PFS tended to be associated with sensitivity to mitomycin C and cisplatin (p ≈ 0.06). At the highest drug concentration tested, the hazard ratio for disease relapse increased stepwise with drug resistance for all drugs.CONCLUSIONS: Ex vivo assessment of drug sensitivity in PMP provides prognostic information. The results suggest a role for IPC as therapeutic adjunct to CRS and for individualization of IPC by pretreatment assessment of drug sensitivity.
  •  
22.
  •  
23.
  • Cao, Christopher, et al. (författare)
  • Prospective Registry On Mesothelioma Peritonei Treatment (PROMPT) : study design and rationale
  • 2012
  • Ingår i: Tumori (Milano). - 0300-8916 .- 2038-2529. ; 98:1, s. 166-171
  • Tidskriftsartikel (refereegranskat)abstract
    • Diffuse malignant peritoneal mesothelioma (DMPM) is an aggressive and rare form of cancer arising from the mesothelial lining of the peritoneum. Due to the latency period between asbestos exposure and disease progression, the peak in incidence of DMPM is likely to occur in the coming decade for many industrialized nations, with a multitude of industrial, medico-legal and health-related implications(1,2). Traditional therapeutic modalities such as systemic chemotherapy and radiotherapy have not been proven to be effective in the treatment of DMPM, and patients diagnosed with the disease have a life expectancy of less than 12 months(3-5). Combined treatment involving cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) has been utilized in several specialized centers around the world and has been found to be a feasible procedure with encouraging survival outcomes(6-8).
  •  
24.
  • Cashin, Peter, et al. (författare)
  • Appendiceal Adenocarcinoids with Peritoneal Carcinomatosis Treated with Cytoreductive Surgery and Intraperitoneal Chemotherapy : a retrospective study of in vitro drug sensitivity and survival
  • 2011
  • Ingår i: Clinical Colorectal Cancer. - 1533-0028. ; 10:2, s. 108-112
  • Tidskriftsartikel (refereegranskat)abstract
    • Purpose: The purpose of this study was to present results on cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) of appendiceal adenocarcinoid (MC) with peritoneal carcinomatosis (PC), to assess drug sensitivity of AAC, as compared with colorectal cancer (CRC), and to report any discordant histopathology. Methods: Ten patients were treated with CRS and HIPEC. Treatment, drug sensitivity profiles, histopathology, and survival data were recorded and matched with potential prognostic indicators. Drug sensitivity was assessed with short-term fluorometric microculture cytotoxicity assay and compared with peritoneal metastases from CRC. Results: Patients with completeness of cytoreduction score (CC) 1 (16.4 months). In the CC 1 group. For standard drugs, tumor cells from MC and CRC were equally sensitive; except for docetaxel, to which MC was more sensitive than CRC. Conclusion: The CC-score correlated with overall survival. Candidates for this type of treatment should be referred early for evaluation in order to reach a better CC score. Drugs used for CRC also seem adequate for treatment of MC, although other drugs, eg, docetaxel, might be more active.
  •  
25.
  •  
26.
  • Cashin, Peter H, 1984-, et al. (författare)
  • Activity ex vivo of cytotoxic drugs in patient samples of peritoneal carcinomatosis with special focus on colorectal cancer
  • 2013
  • Ingår i: BMC Cancer. - 1471-2407 .- 1471-2407. ; 13, s. 435-
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: The optimal choice of cytotoxic drugs for intraperitoneal chemotherapy (IPC) in conjunction with cytoreductive surgery (CRS) for treatment of peritoneal carcinomatosis(PC) is poorly defined. We investigated drug sensitivity ex vivo in patient samples of various PC tumor types and correlated clinical outcome to drug sensitivity within the subset of PC fromcolorectal cancer (CRC). Methods: PC tissue samples (n = 174) from mesothelioma, pseudomyxoma peritonei (PMP), ovarian cancer, CRC or appendix cancer were analyzed ex vivo for sensitivity to oxaliplatin, cisplatin, mitomycin C, melphalan, irinotecan, docetaxel, doxorubicin and 5-FU. Clinicopathological variables and outcome data were collected for the CRC subset. Results: Mesothelioma and ovarian cancer were generally more drug sensitive than CRC, appendix cancer and PMP. Oxaliplatin showed the most favorable ratio between achievable IPC concentration and ex vivo drug sensitivity. Drug sensitivity in CRC varied considerably between individual samples. Ex vivo drug sensitivity did not obviously correlate to time-to-progression (TTP) in individual patients. Conclusions: Drug-sensitivity varies considerably between PC diagnoses and individual patients arguing for individualized therapy in IPC rather than standard diagnosis-specific therapy. However, in the current paradigm of treatment according to diagnosis, oxaliplatin is seemingly the preferred drug for IPC from a drug sensitivity and concentration perspective. Inthe CRC subset, analysis of correlation between ex vivo drug sensitivity and TTP was inconclusive due to the heterogeneous nature of the data.
  •  
27.
  • Cashin, Peter H., et al. (författare)
  • Comparison of Prognostic Scores for Patients with Colorectal Cancer Peritoneal Metastases Treated with Cytoreductive Surgery and Hyperthermic Intraperitoneal Chemotherapy
  • 2013
  • Ingår i: Annals of Surgical Oncology. - 1068-9265 .- 1534-4681. ; 20:13, s. 4183-4189
  • Tidskriftsartikel (refereegranskat)abstract
    • Background. There are three prognostic scores for the cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) treatment of colorectal cancer peritoneal metastases: the newly introduced COREP (colorectal peritoneal) score, the peritoneal surface disease severity score (PSDS), and the prognostic score (PS). The aim was to determine which prognostic score had the best prognostic value. Methods. Between 2006 and 2010, a total of 77 patients with peritoneal metastases fromcolorectal cancer underwent CRS/HIPEC treatment. The COREP, PSDS, and PS scores were successfully applied to 56 patients (73 %) having sufficient data. The end points were prediction of open-and-close cases (n = 9), R1 resections (n = 41), and survival of <12 months (n = 18). Area under the receiver operating characteristic curves (accuracy) was compared. Subgroup analysis was performed on patients not previously used for the development of the COREP score (n = 24). Multivariable logistic regressions of the three end points were performed as well as Cox regression for overall survival. Furthermore, COREP and peritoneal cancer index were compared. Results. For open-and-close case prediction, accuracy for the whole group (n = 56) and subgroup (n = 24) was 87 and 88 %, respectively for COREP; 66 and 77 % for PSDS; and 68 and 78 % for PS. For R1 resection prediction, accuracy was 81 and 81 %, 76 and 78 %, and 75 and 77 %, respectively. For prediction of survival of <12 months, accuracy was 83 and 84, 54 and 67 %, and 55 and 56 %, respectively. The COREP score was the only independent prognostic factor in all four multivariable analyses. A COREP score of >= 6 identified patients with poor survival more accurately than a PCI of >20. Conclusions. The COREP score predicted open-and-close cases, R1 resections, and poor survival better than PSDS and PS. COREP better identifies patients with poor survival than intraoperative PCI.
  •  
28.
  • Cashin, Peter H., et al. (författare)
  • Cytoreductive Surgery and Hyperthermic Intra-Peritoneal Chemotherapy Treatment of Colorectal Peritoneal Metastases : Cohort Analysis of High Volume Disease and Cure Rate
  • 2014
  • Ingår i: Journal of Surgical Oncology. - 0022-4790 .- 1096-9098. ; 110:2, s. 203-206
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Cytoreductive surgery (CRS) and hyperthermic intra-peritoneal chemotherapy (HIPEC) treatment of colorectal peritoneal metastases (PM) is an established treatment alternative. The study aim was, first, to investigate the outcome of high-volume disease defined by the peritoneal cancer index (PCI) 20; second, to report the long-term disease-free survival of patients with >5 years observation. Methods: Consecutive patients with colorectal PM from a prospective HIPEC database between 2004 and 2010 were included, 67 patients. Clinicopathological and outcome parameters were compared between low PCI (n = 40) and high PCI (n = 27). A subgroup analysis on patients with >5 years observation was performed (n = 32). Disease-free survival after 5 years defined cure. Results: Median overall survival (OS) was 28 months, low PCI-group 33 months versus high PCI-group 17 months (P = 0.03). Median OS of patients with complete CRS (n = 56) was 30 months, low PCI-group 37 months versus high PCI-group 27 months (P = 0.2), with 5-year survival of 31% and 21%, respectively. No difference in morbidity/mortality. The cure rate was 22% in the subgroup (7/32) and 28% in those with complete CRS (7/25). Two patients in the cured group had PCI 29 and 34. Discussion: Treatment of high-volume disease may result in long-term survival and even cure. The key is to reach a complete CRS. The overall cure rate is 22%. 
  •  
29.
  • Cashin, Peter H, 1984-, et al. (författare)
  • Cytoreductive Surgery and Intraperitoneal Chemotherapy for Colorectal Peritoneal Carcinomatosis : Prognosis and Treatment of Recurrences in a Cohort Study
  • 2012
  • Ingår i: European Journal of Surgical Oncology. - 0748-7983 .- 1532-2157. ; 38:6, s. 509-515
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Cytoreductive surgery (CRS) and intraperitoneal chemotherapy (IPC) treatment of colorectal peritoneal carcinomatosis (PC) is gaining acceptance, but controversy remains. The primary aims were to analyze the outcome and prognostic variables of colorectal PC patients treated with CRS and IPC, and to report on the outcome of additional surgical treatments of subsequent recurrences. Methods Patients referred for treatment of colorectal PC between 1996 and 2010 were included in a cohort. The following data was collected: clinicopathological parameters, survival, recurrences, perioperative chemotherapy and type of IPC (hyperthermic intraperitoneal chemotherapy, HIPEC; or sequential postoperative intraperitoneal chemotherapy, SPIC). Multivariable analyses were conducted on potential prognostic factors for overall survival (OS). Results In the 151-patient cohort, the median OS was 34months (range: 2-77) for CRS and HIPEC with five-year survival predicted at 40% (five-year disease-free survival 32%). For CRS and SPIC, the OS was 25months (range: 2-188) with five-year survival at 18%.  Open-and-close patients survived 6months (range: 0-14) with no five-year survival (HIPEC vs. SPIC p=0.047, SPIC vs. open-and-close p<0.001). Adjuvant systemic chemotherapy was a noteworthy independent prognostic factor in the multivariable analysis. OS for patients undergoing additional surgical treatment of recurrences was 25months vs. 10months with best supportive care or palliative chemotherapy (p=0.01). Conclusion Substantial long-term survival is possible in patients with colorectal PC. HIPEC was associated with better OS than SPIC and adjuvant systemic chemotherapy may improve the outcome in patients. Good OS is achievable in selected patients undergoing additional surgical treatment of isolated liver or peritoneal recurrences after prior complete CRS.
  •  
30.
  • Cashin, Peter H, 1984- (författare)
  • Cytoreductive Surgery and Intraperitoneal Chemotherapy in Patients with Peritoneal Metastases from Colorectal Cancer : Aspects of loco-regional treatment outcome, patient selection, and chemo-sensitivity
  • 2012
  • Doktorsavhandling (övrigt vetenskapligt)abstract
    • Previously, peritoneal metastases(PM) from colorectal cancer(CRC) have been considered a terminal and generalised form of cancer. A new treatment strategy combining cytoreductive surgery(CRS) and intraperitoneal chemotherapy(IPC) has recently shown promising results. The aim of this thesis was to investigate different aspects of this treatment in order to optimise the treatment and to clarify its potential as a new treatment option. Treatment outcome, patient selection, method of IPC (hyperthermic intraperitoneal chemotherapy-HIPEC vs. sequential postoperative intraperitoneal chemotherapy-SPIC) and choice of drugs for IPC were the aspects covered in this thesis.The treatment outcome of CRS and IPC according to the median overall survival ranged from 24 to 34 months with 5-year overall survival ranging from 20 to 40% depending on the IPC treatment administered. Furthermore, the 5-year disease-free survival was impressive at 32% for patients receiving HIPEC. This establishes the curative potential of this treatment. Due to current inadequacies of radiological imaging, a score (Corep score) was developed for patient selection purposes. This score had a sensitivity of 80% and specificity of 100% in identifying patients with short cancer-specific survival after the treatment (<12 months). Further studies are needed to elucidate the clinical usefulness of the Corep score. HIPEC was associated with better survival than the SPIC method at similar morbidity and mortality rates, suggesting that HIPEC be the method of preference. Concerning the choice of drugs, the last study investigated the chemo-sensitivity of different PM tumour-types with a special focus on CRC. While CRC samples were generally more resistant, the ratio of the in vivo concentration compared to the ex vivo concentration giving a 50% tumour cell death showed that oxaliplatin had the best profile across all PM tumour types as well as for CRC. This needs further confirmation in a clinical trial.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 21-30 av 68
  • Föregående 12[3]4567Nästa
 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy