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12 results on '"Poortman, Pieter"'

1. Adjuvant hyperthermic intraperitoneal chemotherapy in patients with locally advanced colon cancer (COLOPEC): a multicentre, open-label, randomised trial

Author

Andeweg, Caroline S., Bastiaenen, Vivian P., Bemelman, Willem A., van der Bilt, Jarmila D.W., Bloemen, Johanne, den Boer, Frank C., Boerma, Djamila, ten Bokkel Huinink, Daan, Brokelman, Walter J.A., Cense, Huib A., Consten, Esther C.J., Creemers, Geert-Jan, Crolla, Rogier M.P.H., Dekker, Jan-Willem T., Demelinne, Jennifer, van Det, Marc J., van Diepen, Karin K., Diepeveen, Marjolein, van Duyn, Eino B., van den Ende, Esther D., Evers, Pauline, van Geloven, Anna A.W., van der Harst, Erwin, Heemskerk, Jeroen, Heikens, Joost T., Hess, Daniel A., Inberg, Bas, Jansen, Jan, Kloppenberg, Frank W.H., Kootstra, Thomas J.M., Kortekaas, R.T.J., Los, Maartje, Madsen, Eva V.E., van der Mijle, H.C.J., Mol, Linda, Neijenhuis, Peter A., Nienhuijs, Simon W., van den Nieuwenhof, Loes, Peeters, Koen C.M.J., Polle, Sebastiaan W., Pon, Jolien, Poortman, Pieter, Radema, Sandra A., van Ramshorst, Bert, de Reuver, Philip R., Rovers, Koen P., Schmitz, Roderick F., Sluiter, Nina, Sommeijer, Dirkje W., Sonneveld, D.J.A., van Sprundel, T.C., Veltkamp, Sanne C., Vermaas, Maarten, Verwaal, Victor J., Wassenaar, Emma, Wegdam, Johannes A., de Wilt, Johannes H.W., Westerterp, Marinke, Wit, Fennie, Witkamp, Arjen J., van Woensdregt, Karlijn, van der Zaag, Edwin S., Zournas, Mandy, Klaver, Charlotte E L, Wisselink, Daniel D, Punt, Cornelis J A, Snaebjornsson, Petur, Crezee, Johannes, Aalbers, Arend G J, Brandt, Alexandra, Bremers, Andre J A, Burger, Jacobus W A, Fabry, Hans F J, Ferenschild, Floris, Festen, Sebastiaan, van Grevenstein, Wilhelmina M U, Hemmer, Patrick H J, de Hingh, Ignace H J T, Kok, Niels F M, Musters, Gijsbert D, Schoonderwoerd, Lotte, Tuynman, Jurriaan B, van de Ven, Anthony W H, van Westreenen, Henderik L, Wiezer, Marinus J, Zimmerman, David D E, van Zweeden, Annette A, Dijkgraaf, Marcel G W, and Tanis, Pieter J

Published
2019
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2. The measured distance between tumor cells and the peritoneal surface predicts the risk of peritoneal metastases and offers an objective means to differentiate between pT3 and pT4a colon cancer

Author

Zwanenburg, Emma S., primary, Wisselink, Daniel D., additional, Klaver, Charlotte E.L., additional, van der Bilt, Jarmila D.W., additional, Tanis, Pieter J., additional, Snaebjornsson, Petur, additional, Andeweg, Caroline S., additional, Bastiaenen, Vivian P., additional, Bemelman, Willem A., additional, Bloemen, Johanne, additional, den Boer, Frank C., additional, Boerma, Djamila, additional, Huinink, Daan ten Bokkel, additional, Brokelman, Walter J.A., additional, Cense, Huib A., additional, Consten, Esther C.J., additional, Creemers, Geert-Jan, additional, Crolla, Rogier M.P.H., additional, Dekker, Jan-Willem T., additional, Demelinne, Jennifer, additional, van Det, Marc J., additional, van Diepen, Karin K., additional, Diepeveen, Marjolein, additional, van Duyn, Eino B., additional, van den Ende, Esther D., additional, Evers, Pauline, additional, van Geloven, Anna A.W., additional, van der Harst, Erwin, additional, Heemskerk, Jeroen, additional, Heikens, Joost T., additional, Hess, Daniel A., additional, Inberg, Bas, additional, Jansen, Jan, additional, Kloppenberg, Frank W.H., additional, Kootstra, Thomas J.M., additional, Kortekaas, R.T.J., additional, Los, Maartje, additional, Madsen, Eva V.E., additional, van der Mijle, H.C.J., additional, Mol, Linda, additional, Neijenhuis, Peter A., additional, Nienhuijs, Simon W., additional, van den Nieuwenhof, Loes, additional, Peeters, Koen C.M.J., additional, Polle, Sebastiaan W., additional, Pon, Jolien, additional, Poortman, Pieter, additional, Radema, Sandra A., additional, van Ramshorst, Bert, additional, de Reuver, Philip R., additional, Rovers, Koen P., additional, Schmitz, Roderick F., additional, Sluiter, Nina, additional, Sommeijer, Dirkje W., additional, Sonneveld, Eric, additional, van Sprundel, T.C., additional, Veltkamp, Sanne C., additional, Vermaas, Maarten, additional, Verwaal, Victor J., additional, Wassenaar, Emma, additional, Wegdam, Johannes A., additional, de Wilt, Johannes H.W., additional, Westerterp, Marinke, additional, Wit, Fennie, additional, Witkamp, Arjen J., additional, van Woensdregt, Karlijn, additional, van der Zaag, Edwin S., additional, and Zournas, Mandy, additional

Published
2022
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5. Adjuvant hyperthermic intraperitoneal chemotherapy in patients with locally advanced colon cancer (COLOPEC): a multicentre, open-label, randomised trial

Author

Klaver, Charlotte E L, primary, Wisselink, Daniel D, additional, Punt, Cornelis J A, additional, Snaebjornsson, Petur, additional, Crezee, Johannes, additional, Aalbers, Arend G J, additional, Brandt, Alexandra, additional, Bremers, Andre J A, additional, Burger, Jacobus W A, additional, Fabry, Hans F J, additional, Ferenschild, Floris, additional, Festen, Sebastiaan, additional, van Grevenstein, Wilhelmina M U, additional, Hemmer, Patrick H J, additional, de Hingh, Ignace H J T, additional, Kok, Niels F M, additional, Musters, Gijsbert D, additional, Schoonderwoerd, Lotte, additional, Tuynman, Jurriaan B, additional, van de Ven, Anthony W H, additional, van Westreenen, Henderik L, additional, Wiezer, Marinus J, additional, Zimmerman, David D E, additional, van Zweeden, Annette A, additional, Dijkgraaf, Marcel G W, additional, Tanis, Pieter J, additional, Andeweg, Caroline S., additional, Bastiaenen, Vivian P., additional, Bemelman, Willem A., additional, van der Bilt, Jarmila D.W., additional, Bloemen, Johanne, additional, den Boer, Frank C., additional, Boerma, Djamila, additional, ten Bokkel Huinink, Daan, additional, Brokelman, Walter J.A., additional, Cense, Huib A., additional, Consten, Esther C.J., additional, Creemers, Geert-Jan, additional, Crolla, Rogier M.P.H., additional, Dekker, Jan-Willem T., additional, Demelinne, Jennifer, additional, van Det, Marc J., additional, van Diepen, Karin K., additional, Diepeveen, Marjolein, additional, van Duyn, Eino B., additional, van den Ende, Esther D., additional, Evers, Pauline, additional, van Geloven, Anna A.W., additional, van der Harst, Erwin, additional, Heemskerk, Jeroen, additional, Heikens, Joost T., additional, Hess, Daniel A., additional, Inberg, Bas, additional, Jansen, Jan, additional, Kloppenberg, Frank W.H., additional, Kootstra, Thomas J.M., additional, Kortekaas, R.T.J., additional, Los, Maartje, additional, Madsen, Eva V.E., additional, van der Mijle, H.C.J., additional, Mol, Linda, additional, Neijenhuis, Peter A., additional, Nienhuijs, Simon W., additional, van den Nieuwenhof, Loes, additional, Peeters, Koen C.M.J., additional, Polle, Sebastiaan W., additional, Pon, Jolien, additional, Poortman, Pieter, additional, Radema, Sandra A., additional, van Ramshorst, Bert, additional, de Reuver, Philip R., additional, Rovers, Koen P., additional, Schmitz, Roderick F., additional, Sluiter, Nina, additional, Sommeijer, Dirkje W., additional, Sonneveld, D.J.A., additional, van Sprundel, T.C., additional, Veltkamp, Sanne C., additional, Vermaas, Maarten, additional, Verwaal, Victor J., additional, Wassenaar, Emma, additional, Wegdam, Johannes A., additional, de Wilt, Johannes H.W., additional, Westerterp, Marinke, additional, Wit, Fennie, additional, Witkamp, Arjen J., additional, van Woensdregt, Karlijn, additional, van der Zaag, Edwin S., additional, and Zournas, Mandy, additional

Published
2019
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6. Ultrasound-guided breast-sparing surgery to improve cosmetic outcomes and quality of life. A prospective multicentre randomised controlled clinical trial comparing ultrasound-guided surgery to traditional palpation-guided surgery (COBALT trial)

Author

Bergers Elisabeth, Taets van Amerongen Annette HM, Bosch Anne, de Roos Wilfred K, de Widt Louise, Poortman Pieter, Muller Sandra, van der Veen Henk, Rijna Herman, Lopes Cardozo Alexander MF, Schreurs Hermien WH, Zonderhuis Barbara M, Krekel Nicole MA, van der Linden Mecheline HM, de Lange de Klerk Elly SM, Winters Henri AH, Meijer Sybren, and van den Tol Petrousjka MP

Subjects
Surgery, RD1-811
Abstract

Abstract Background Breast-conserving surgery for breast cancer was developed as a method to preserve healthy breast tissue, thereby improving cosmetic outcomes. Thus far, the primary aim of breast-conserving surgery has been the achievement of tumour-free resection margins and prevention of local recurrence, whereas the cosmetic outcome has been considered less important. Large studies have reported poor cosmetic outcomes in 20-40% of patients after breast-conserving surgery, with the volume of the resected breast tissue being the major determinant. There is clear evidence for the efficacy of ultrasonography in the resection of nonpalpable tumours. Surgical resection of palpable breast cancer is performed with guidance by intra-operative palpation. These palpation-guided excisions often result in an unnecessarily wide resection of adjacent healthy breast tissue, while the rate of tumour-involved resection margins is still high. It is hypothesised that the use of intra-operative ultrasonography in the excision of palpable breast cancer will improve the ability to spare healthy breast tissue while maintaining or even improving the oncological margin status. The aim of this study is to compare ultrasound-guided surgery for palpable tumours with the standard palpation-guided surgery in terms of the extent of healthy breast tissue resection, the percentage of tumour-free margins, cosmetic outcomes and quality of life. Methods/design In this prospective multicentre randomised controlled clinical trial, 120 women who have been diagnosed with palpable early-stage (T1-2N0-1) primary invasive breast cancer and deemed suitable for breast-conserving surgery will be randomised between ultrasound-guided surgery and palpation-guided surgery. With this sample size, an expected 20% reduction of resected breast tissue and an 18% difference in tumour-free margins can be detected with a power of 80%. Secondary endpoints include cosmetic outcomes and quality of life. The rationale, study design and planned analyses are described. Conclusion The COBALT trial is a prospective, multicentre, randomised controlled study to assess the efficacy of ultrasound-guided breast-conserving surgery in patients with palpable early-stage primary invasive breast cancer in terms of the sparing of breast tissue, oncological margin status, cosmetic outcomes and quality of life. Trial Registration Number Netherlands Trial Register (NTR): NTR2579

Published
2011
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7. Ultrasound-guided breast-sparing surgery to improve cosmetic outcomes and quality of life. A prospective multicentre randomised controlled clinical trial comparing ultrasound-guided surgery to traditional palpation-guided surgery (COBALT trial)

Author

Krekel, Nicole MA, primary, Zonderhuis, Barbara M, additional, Schreurs, Hermien WH, additional, Lopes Cardozo, Alexander MF, additional, Rijna, Herman, additional, van der Veen, Henk, additional, Muller, Sandra, additional, Poortman, Pieter, additional, de Widt, Louise, additional, de Roos, Wilfred K, additional, Bosch, Anne Marie, additional, Taets van Amerongen, Annette HM, additional, Bergers, Elisabeth, additional, van der Linden, Mecheline HM, additional, de Lange de Klerk, Elly SM, additional, Winters, Henri AH, additional, Meijer, Sybren, additional, and van den Tol, Petrousjka MP, additional

Published
2011
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11. [The use of imaging in the case of suspected acute appendicitis: opinion of Dutch surgeons].

Author

Poortman P, Oostvogel HJ, de Lange-de Klerk ES, Cuesta MA, and Hamming JF

Subjects
Appendicitis diagnostic imaging, Health Care Surveys, Humans, Surveys and Questionnaires, Appendicitis diagnosis, Practice Patterns, Physicians', Tomography, X-Ray Computed, Ultrasonography
Abstract

Objective: To gauge the opinion of Dutch surgeons concerning the use of ultrasound and CT in the case of a suspected acute appendicitis., Design: Written survey., Method: All 1020 members of the Association of the Surgeons of the Netherlands received a questionnaire with 8 statements concerning the diagnosis of acute appendicitis. The statements could be answered with 'agree', 'disagree', or 'no opinion'., Results: The questionnaire was returned by 439 members (43%). A majority (64%) of these respondents established the diagnosis acute appendicitis on the basis of clinical symptoms, whereas a minority (22%) routinely performed ultrasound. For a classical presentation, 45% of the respondents thought ultrasound was indicated; for less than 3 classical symptoms, 70% of the respondents thought ultrasound was indicated. For women of fertile age, 74% of the respondents thought ultrasound was indicated. Approximately half (46%) of the surgeons always had access to a radiologist who could reliably perform ultrasound imaging, whereas 34% did not. The combination of ultrasound and CT was considered to be a reliable diagnostic procedure by 74% of the surgeons., Conclusion: The majority of the surgeons considered acute appendicitis to be mainly a clinical diagnosis.

Published
2009

12. Comparison of CT and sonography in the diagnosis of acute appendicitis: a blinded prospective study.

Author

Poortman P, Lohle PN, Schoemaker CM, Oostvogel HJ, Teepen HJ, Zwinderman KA, and Hamming JF

Subjects
Acute Disease, Adolescent, Adult, Aged, Aged, 80 and over, Appendicitis surgery, Child, Child, Preschool, Diagnosis, Differential, Female, Humans, Male, Middle Aged, Predictive Value of Tests, Prospective Studies, Sensitivity and Specificity, Ultrasonography, Appendicitis diagnostic imaging, Tomography, X-Ray Computed
Abstract

Objective: Our objective was to compare the accuracy of CT and sonography in a general community teaching hospital for the diagnosis of acute appendicitis in patients with suspected acute appendicitis. SUBJECTS AND METHODS. In this prospective study, 199 consecutive patients with clinical signs and symptoms of acute appendicitis were examined with sonography (graded compression technique) and CT (focused unenhanced single-detector helical CT [5-mm section thickness]. CT was performed from the L2 vertebral body to the pubic symphysis, and no patients were given oral, rectal, or IV contrast medium. The primary sonographic criterion for diagnosing acute appendicitis was an incompressible appendix with a transverse outer diameter of 6 mm or larger with incompressible periappendicular inflamed fat with or without an appendicolith. The primary CT criterion for diagnosing acute appendicitis was the identification of an appendix with a transverse outer diameter of 6 mm or larger with associated periappendiceal inflammatory changes. The results, independently reported, were correlated with surgical and histopathologic findings., Results: One hundred thirty-two patients had acute appendicitis at surgery, and 67 patients did not. The sensitivity of CT and sonography was 76% and 79%, respectively; the specificity was 83% and 78%; the accuracy was 78% and 78%; the positive predictive value was 90% and 87%; and the negative predictive value was 64% and 65%., Conclusion: Unenhanced focused single-detector helical CT and graded compression sonography performed in a general community teaching hospital by both body imaging radiologists and general radiology staff members have a similar accuracy for the diagnosis of acute appendicitis.

Published
2003
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