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Pancreatic Neoplasms: HELP
Articles by Niek A. Peters
Based on 4 articles published since 2010
(Why 4 articles?)

Between 2010 and 2020, Niek A. Peters wrote the following 4 articles about Pancreatic Neoplasms.
+ Citations + Abstracts
1 Review Geographical variation and trends in outcomes of laparoscopic spleen-preserving distal pancreatectomy with or without splenic vessel preservation: A meta-analysis. 2017

Yongfei, Hua / Javed, Ammar A / Burkhart, Richard / Peters, Niek A / Hasanain, Alina / Weiss, Matthew J / Wolfgang, Christopher L / He, Jin. ·Department of Surgery, The Johns Hopkins Hospital, Baltimore, MD, USA; Department of Surgery, Lihuili Eastern Hospital, Ningbo, China. · Department of Surgery, The Johns Hopkins Hospital, Baltimore, MD, USA. · Department of Surgery, The Johns Hopkins Hospital, Baltimore, MD, USA; University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands. · Department of Surgery, The Johns Hopkins Hospital, Baltimore, MD, USA. Electronic address: jhe11@jhmi.edu. ·Int J Surg · Pubmed #28735894.

ABSTRACT: BACKGROUND: Distal pancreatectomy (DP) is performed to treat tumors of the pancreatic body and tail. Traditionally, splenectomy is performed with a DP, however, laparoscopic spleen-preserving DP (SPDP) using Warshaw's (splenic vessels ligation) or Kimura's (splenic vessels preservation) techniques have been reported. The clinical benefits of using either technique remain unclear. In this study, we conducted a meta-analysis to compare the clinical outcomes of patients undergoing Warshaw's and Kimura SPDP. This is the first study to evaluate the geographical variation in outcomes of Warshaw's and Kimura SPDP. METHODS: Databases of PubMed, Embase, and Cochrane library were used to identify studies reporting Warshaw's and Kimura SPDP. Clinical outcomes were compared. Pooled odds risk and weighted mean difference with 95% confidence interval were calculated using random effect models. RESULTS: Fourteen non-randomized controlled studies involving 945 patients met our selection criteria. 301 (31.9%) patients underwent Warshaw's SPDP; 644 (68.1%) underwent Kimura SPDP. Compared to Warshaw's SPDP, patients undergoing Kimura SPDP had a lower incidence of post-operative complications including spleen infarction (OR = 9.64, 95% CI = 5.79 to 16.05, P < 0.001) and gastric varices (OR = 11.88, 95% CI = 5.11 to 27.66, P < 0.001). The length of surgery was significantly shorter for Warshaw's SPDP (WMD = -18.12, 95%CI = -26.52 to -9.72, p < 0.001). Decreased blood loss was reported for patients undergoing Warshaw's SPDP (WMD = -59.72, 95%CI = -102.01 to -17.43, p = 0.006). There were no differences between the two groups' rates of conversion to an open procedure (P = 0.35), postoperative pancreatic fistula (P = 0.71), need for reoperation (P = 0.25), and length of hospital stay (P = 0.38). CONCLUSION: Both Warshaw's and Kimura are safe SPDP techniques. These data suggest Kimura SPDP is the preferred technique due to less risk of splenic infarct and gastric varices. Despite evidence of regional variation in volume performed (between Kimura and Warshaw's), there are no statistically significant differences in outcomes between these techniques.

2 Article Outcomes and Risk Score for Distal Pancreatectomy with Celiac Axis Resection (DP-CAR): An International Multicenter Analysis. 2019

Klompmaker, Sjors / Peters, Niek A / van Hilst, Jony / Bassi, Claudio / Boggi, Ugo / Busch, Olivier R / Niesen, Willem / Van Gulik, Thomas M / Javed, Ammar A / Kleeff, Jorg / Kawai, Manabu / Lesurtel, Mickael / Lombardo, Carlo / Moser, A James / Okada, Ken-Ichi / Popescu, Irinel / Prasad, Raj / Salvia, Roberto / Sauvanet, Alain / Sturesson, Christian / Weiss, Matthew J / Zeh, Herbert J / Zureikat, Amer H / Yamaue, Hiroki / Wolfgang, Christopher L / Hogg, Melissa E / Besselink, Marc G / Anonymous4750974. ·Department of Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands. · Department of Surgery, Johns Hopkins Hospital, Baltimore, MD, USA. · Department of Surgery, University of Utrecht Medical Center, Utrecht, The Netherlands. · Department of Surgery, Pancreas Institute University of Verona, Verona, Italy. · Division of General and Transplant Surgery, University of Pisa, Pisa, Italy. · Department of General, Visceral and Transplantation Surgery, Heidelberg University, Heidelberg, Germany. · Department of Visceral, Vascular and Endocrine Surgery, Martin-Luther-University Halle-Wittenberg, Halle, Saale, Germany. · Second Department of Surgery, Wakayama Medical University, Wakayama, Japan. · Department of Surgery and Liver Transplantation, Croix-Rousse University Hospital, Hospices Civils de Lyon, University of Lyon I, Lyon, France. · The Pancreas and Liver Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA. · Center of General Surgery and Liver Transplant, Fundeni Clinical Institute, Bucharest, Romania. · Department of HPB and Transplant Services, National Health Service, Leeds, UK. · Department of HPB Surgery, Hôpital Beaujon, APHP, University Paris VII, Clichy, France. · Division of Surgery, Department for Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet at Karolinska University Hospital, Stockholm, Sweden. · Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA. · Department of Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA. · Department of Surgery, Northshore University HealthSystem, Chicago, IL, USA. · Department of Surgery, Cancer Center Amsterdam, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands. m.g.besselink@amc.nl. ·Ann Surg Oncol · Pubmed #30610560.

ABSTRACT: BACKGROUND: Distal pancreatectomy with celiac axis resection (DP-CAR) is a treatment option for selected patients with pancreatic cancer involving the celiac axis. A recent multicenter European study reported a 90-day mortality rate of 16%, highlighting the importance of patient selection. The authors constructed a risk score to predict 90-day mortality and assessed oncologic outcomes. METHODS: This multicenter retrospective cohort study investigated patients undergoing DP-CAR at 20 European centers from 12 countries (model design 2000-2016) and three very-high-volume international centers in the United States and Japan (model validation 2004-2017). The area under receiver operator curve (AUC) and calibration plots were used for validation of the 90-day mortality risk model. Secondary outcomes included resection margin status, adjuvant therapy, and survival. RESULTS: For 191 DP-CAR patients, the 90-day mortality rate was 5.5% (95 confidence interval [CI], 2.2-11%) at 5 high-volume (≥ 1 DP-CAR/year) and 18% (95 CI, 9-30%) at 18 low-volume DP-CAR centers (P = 0.015). A risk score with age, sex, body mass index (BMI), American Society of Anesthesiologists (ASA) score, multivisceral resection, open versus minimally invasive surgery, and low- versus high-volume center performed well in both the design and validation cohorts (AUC, 0.79 vs 0.74; P = 0.642). For 174 patients with pancreatic ductal adenocarcinoma, the R0 resection rate was 60%, neoadjuvant and adjuvant therapies were applied for respectively 69% and 67% of the patients, and the median overall survival period was 19 months (95 CI, 15-25 months). CONCLUSIONS: When performed for selected patients at high-volume centers, DP-CAR is associated with acceptable 90-day mortality and overall survival. The authors propose a 90-day mortality risk score to improve patient selection and outcomes, with DP-CAR volume as the dominant predictor.

3 Article Patients with a resected pancreatic mucinous cystic neoplasm have a better prognosis than patients with an intraductal papillary mucinous neoplasm: A large single institution series. 2017

Griffin, James F / Page, Andrew J / Samaha, Georges J / Christopher, Adrienne / Bhaijee, Feriyl / Pezhouh, Maryam K / Peters, Niek A / Hruban, Ralph H / He, Jin / Makary, Martin A / Lennon, Anne Marie / Cameron, John L / Wolfgang, Christopher L / Weiss, Matthew J. ·Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, USA. · Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA. · Department of Gastroenterology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA. · Department of Surgery, The Johns Hopkins University School of Medicine, Baltimore, MD, USA. Electronic address: mweiss5@jhmi.edu. ·Pancreatology · Pubmed #28416122.

ABSTRACT: BACKGROUND/OBJECTIVES: Mucinous cystic neoplasms (MCNs) are rare pancreas tumors distinguished from intraductal papillary mucinous neoplasms (IPMNs) by the presence of ovarian-type stroma. Historical outcomes for MCNs vary due to previously ambiguous diagnostic criteria resulting in confusion with IPMNs. This study seeks to characterize and clarify the clinical features and long-term outcomes of MCNs versus IPMNs in the largest single-institution series of pathology-confirmed MCNs to date. METHODS: We compared 142 MCNs and 746 IPMNs resected at a single institution. MCNs were reviewed for confirmation of ovarian-type stroma and reclassified according to current WHO guidelines. RESULTS: MCNs presented almost exclusively in middle-aged women (median 47.5 years, 96.5% female) as solitary (100%), macrocystic (94.2%) lesions in the distal pancreas (92.1%). IPMNs were distributed equally by sex in an older population (median 69.0 years, 49.6% female) and favored the proximal pancreas (67.6%). Compared with IPMNs, MCNs were larger (4.2 cm vs 2.5 cm) and more often low-grade (71.1% vs 13.8%). Associated invasive carcinoma was less common in MCNs than in IPMNs (9.9% vs 32.4%). Surgical resection was curative for 100% of noninvasive MCNs. Patients with an MCN-associated invasive carcinoma had a much better prognosis than did patients with an IPMN-associated invasive carcinoma with 10-year disease-specific survival of 79.6% versus 27.2%, respectively. CONCLUSION: MCNs have a stereotypical clinical profile that is readily distinguishable from IPMNs based on demographic features, imaging, and pathology. Most MCNs are noninvasive and curable with surgical resection. Prognosis remains excellent even for invasive disease with 10-year survival approaching 80% following resection.

4 Article Modified Appleby Procedure for Pancreatic Adenocarcinoma: Does Improved Neoadjuvant Therapy Warrant Such an Aggressive Approach? 2016

Peters, Niek A / Javed, Ammar A / Cameron, John L / Makary, Martin A / Hirose, Kenzo / Pawlik, Timothy M / He, Jin / Wolfgang, Christopher L / Weiss, Matthew J. ·Department of Surgery, Johns Hopkins Hospital, Baltimore, MD, USA. · University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands. · Department of Surgery, Johns Hopkins Hospital, Baltimore, MD, USA. mweiss5@jhmi.edu. ·Ann Surg Oncol · Pubmed #27328946.

ABSTRACT: BACKGROUND: With improved neoadjuvant regimens, more aggressive surgical resections may be warranted for patients with locally advanced pancreatic cancer (LAPC) with focal encasement of the celiac axis (CA) and proximal common hepatic artery (HA). We sought to investigate the clinicopathological features and outcomes of the modified Appleby procedure (DP-CAR) in light of improved neoadjuvant therapies. METHODS: A prospectively maintained database of all pancreatectomies performed at Johns Hopkins Hospital, Baltimore, MD, USA, was reviewed to identify all patients who underwent DP-CAR for pancreatic ductal adenocarcinoma (PDAC) between 2004 and 2016. A 3:1 match for patients undergoing distal pancreatectomy (DP) versus DP-CAR was performed on the basis of their clinicopathological features. RESULTS: Seventeen patients who underwent DP-CAR were matched to 51 patients who underwent DP for resection of PDAC. Prior to DP-CAR, 15 (88.2 %) patients received neoadjuvant therapy, and the most frequently used regimen was FOLFIRINOX (80.0 %). DP-CAR was associated with longer operative time (404 vs. 309 min; p = 0.003) and elevated postoperative liver transaminases compared with DP. No difference was observed in estimated blood loss and length of hospitalization. R0 resection was achieved in 82.4 % of DP-CAR patients versus 92.2 % of DP patients (p = 0.355). No difference was observed in postoperative outcomes, including overall complications, pancreatic fistula, readmission, and mortality. Median survival for DP-CAR was 20 versus 19 months in the DP group (p = 0.757). CONCLUSION: In light of improved neoadjuvant therapeutic regimens, the modified Appleby procedure is a feasible and safe treatment option for patients with LAPC involving the CA, with morbidity and mortality similar to patients undergoing classic DP.