Publications by authors named "Mark F J Stolk"

11 Publications

  • Page 1 of 1

Magnetic resonance enterography findings of a gastrocolic fistula in Crohn's disease.

Quant Imaging Med Surg 2016 Aug;6(4):482-485

Department of Radiology, Sint Antonius Ziekenhuis, Nieuwegein, The Netherlands.

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August 2016

[Acute liver injury in a patient with anorexia nervosa].

Ned Tijdschr Geneeskd 2013 ;157(29):A6247

St. Antonius Ziekenhuis, Afd. Interne Geneeskunde, Nieuwegein, the Netherlands.

Background: Anorexia nervosa is associated with somatic complications. Mildly abnormal liver tests are frequently seen; however, severe acute liver injury is rare in anorexia.

Case Description: A 23-year-old woman was admitted with acutely elevated liver enzymes and hypoglycemia. All diagnostic tests for acute hepatitis were negative. Therefore, we made the diagnosis of 'acute liver injury due to anorexia'. With supportive care such as rehydration, drip-feed and infusions with glucose, the patient recovered and her liver tests improved.

Conclusion: Severe acute liver injury is a rare but life-threatening complication of anorexia nervosa. Its aetiology is unknown. Autophagy of hepatocytes, hypoperfusion of the liver and oxidative stress may play a role in the pathogenesis. Treatment consists of rehydration and nutritional support.
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November 2013

Recording of family history is associated with colorectal cancer stage.

Eur J Gastroenterol Hepatol 2013 Apr;25(4):482-7

Department of Gastroenterology and Hepatology, Sint Antonius Hospital, 3508 GA trecht, The Netherlands.

Background: Colorectal cancer (CRC) associated with Lynch syndrome usually presents at a relatively young age. The Revised Bethesda Guidelines advise screening for Lynch syndrome in patients diagnosed with CRC and a positive family history (FH) of CRC and other Lynch-related cancers.

Objective: To evaluate recording of the FH and identify factors associated with recording in young patients with CRC.

Patients And Methods: In one academic and two nonacademic hospitals, of all patients diagnosed with CRC at the age of 60 years or younger between 1999 and 2007, electronic medical records were evaluated for a recorded FH of CRC and other Lynch-related cancers. Patient and tumor characteristics were retrieved from the Dutch Comprehensive Cancer Centre and the Dutch Pathological Archive.

Results: A total of 676 patients were identified. FH was recorded in 395/676 (58%) patients. From 1999 to 2007, recording improved with an odds ratio (OR) of 1.10 [95% confidence interval (CI) 1.03-1.17] per year. Stage III CRC (OR 1.71, 95% CI 1.07-2.75) and administration of chemotherapy (OR 1.84, 95% CI 1.17-2.89) were associated with recording in multivariate analysis. Other factors, including age at diagnosis, sex, surgery, radiotherapy, proximal tumor localization, poor differentiation, and mucinous histology, were not associated with recording.

Conclusion: A FH of CRC and other Lynch-related cancers was not recorded in ∼40% of young CRC patients and recording improved only slightly over the years. As a first step in the identification of Lynch-related cancer families, physicians should be trained to record a detailed FH in the work-up of all newly diagnosed CRC patients.
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April 2013

The Global Rating Scale in clinical practice: a comprehensive quality assurance programme for endoscopy departments.

Dig Liver Dis 2012 Nov 25;44(11):919-24. Epub 2012 Jul 25.

The Departments of Gastroenterology and Hepatology of Erasmus MC University Medical Center, Rotterdam, The Netherlands.

Background: The Global Rating Scale is an endoscopy quality assurance programme, successfully implemented in England. It remains uncertain whether it is applicable in another health care setting.

Aim: To assess the applicability of the Global Rating Scale as benchmark tool in an international context.

Methods: Eleven Dutch endoscopy departments were included for a Global Rating Scale-census, performed as a cross-sectional evaluation, July 2010. Two Global Rating Scale-dimensions - 'clinical quality' and 'patient experience' - were assessed across six items using a range of levels: from level-D (basic) to level-A (excellent). Construct validity was assessed by comparing department-specific colonoscopy audit data to GRS-levels.

Results: For 'clinical quality', variable scores were achieved in items 'safety' (9%=B, 27%=C, 64%=D) and 'communication' (46%=A, 18%=C, 36%=D). All departments achieved a basic score in 'quality' (100%=D). For 'patient experience', variable scores were achieved in 'timeliness' (18%=A, 9%=B, 73%=D) and 'booking-choice' (36%=B, 46%=C, 18%=D). All departments achieved basic scores in 'equality' (100%=D). Departments obtaining level-C or above in 'information', 'comfort', 'communication', 'timeliness' and 'aftercare', achieved significantly better audit outcomes compared to those obtaining level-D (p<0.05).

Conclusion: The Global Rating Scale is appropriate to use outside England. There was significant variance across departments in dimensions. Most Global Rating Scale-levels were in line with departments' audit outcomes, indicating construct validity.
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November 2012

The incidence of 30-day adverse events after colonoscopy among outpatients in the Netherlands.

Am J Gastroenterol 2012 Jun 6;107(6):878-84. Epub 2012 Mar 6.

Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.

Objectives: Colonoscopy is the gold standard for visualization of the colon. It is generally accepted as a safe procedure and major adverse events occur at a low rate. However, few data are available on structured assessment of (minor) post-procedural adverse events.

Methods: Consecutive outpatients undergoing colonoscopy were asked for permission to be called 30 days after their procedure. A standard telephone interview was developed to assess the occurrence of (i) major adverse events (hospital visit required), (ii) minor adverse events, and (iii) days missed from work. Adverse events were further categorized in definite-, possible-, and unrelated adverse events. Patients were contacted between January 2010 and September 2010.

Results: Out of a total of 1,528 patients who underwent colonoscopy and gave permission for a telephone call, 1,144 patients were contacted (response: 75%), 49% were male, the mean age was 59 years (s.d.: 14). Thirty-four patients (3%) reported major adverse events. These were definite-related in nine (1%) patients, possible-related in 6 (1%), and unrelated in 19 patients (2%). Minor adverse events were reported by 466 patients (41%). These were definite-related in 336 patients (29%), possible-related in 36 (3%), and unrelated in the remaining 94 patients (8%). Female gender (odds ratio (OR): 1.5), age <50 years (OR: 1.5), colonoscopy for colorectal cancer screening/surveillance (OR: 1.6), and fellow-endoscopy (OR: 1.7) were risk factors for the occurrence of any definite-related adverse event. Patients who reported definite-related adverse events were significantly less often willing to return for colonoscopy (81 vs. 88%, P<0.01) and were less often positive about the entire colonoscopy experience (84 vs. 89%, P=0.04).

Conclusions: Structured assessment of post-colonoscopy adverse events shows that these are more common than generally reported. Close to one-third of patients report definite-related adverse events, which are major in close to 1 in 100 patients. The occurrence of adverse events does have an impact on the willingness to return for colonoscopy.
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June 2012

The additional value of EUS-guided Tru-cut biopsy to EUS-guided FNA in patients with mediastinal lesions.

Gastrointest Endosc 2009 May 26;69(6):1045-51. Epub 2009 Feb 26.

Department of Gastroenterology, St Antonius Hospital, Nieuwegein, the Netherlands.

Background And Objective: EUS-guided FNA is a sensitive method to obtain cytologic specimens from solid lesions in close proximity to the GI tract. Although FNA provides cells for analysis, large-caliber Tru-cut biopsy (EUS-TCB) needles obtain samples that can be used for additional histopathologic analysis. We assessed the additional diagnostic yield of EUS-TCB in patients with solid mediastinal lesions in whom EUS-FNA was performed.

Patients And Design: In the period from July 2003 to July 2007, all patients with mediastinal lesions accessible to EUS-FNA and EUS-TCB were evaluated. In all patients, a mean of 3 passes of EUS-FNA was followed by EUS-TCB. Cytologic and histologic specimens were evaluated by 2 pathologists blinded for patient condition. A final diagnosis was obtained by combining all information present (EUS-FNA and EUS-TCB results, mediastinoscopy, bronchoscopy [if performed], and other investigations).

Results: The diagnostic accuracy of EUS-FNA, EUS-TCB, and the combination of both techniques was 93%, 90%, and 98%, respectively (not significant). In EUS-FNA-negative patients, EUS-TCB provided a final diagnosis in an additional 3 patients (5%). Malignant disease found by EUS-FNA could be specified by EUS-TCB in 15 patients (25% of patients). The granulomatous disease established by cytologic samples of clinically suspected tuberculosis could be specified by EUS-TCB in 2 patients (3%). In 1 patient (2%), both FNA and TCB were inconclusive.

Limitations: Retrospective study.

Conclusions: The diagnostic yield of EUS-FNA and EUS-TCB is comparable. We recommend limiting the use of EUS-TCB to specific cases in which EUS-FNA is not conclusive.
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May 2009

Clinical consequences of videocapsule endoscopy in GI bleeding and Crohn's disease.

Gastrointest Endosc 2007 Dec 27;66(6):1164-70. Epub 2007 Sep 27.

Department of Gastroenterology, St. Antonius Hospital, Nieuwegein, The Netherlands.

Background: Videocapsule endoscopy (VCE) has a high diagnostic yield in the analysis of GI bleeding and Crohn's disease. Little information is available on the impact of VCE findings on clinical care.

Objective: Assess the impact of VCE findings on clinical management and outcome.

Design: Retrospective descriptive study.

Setting: General hospital.

Patients: VCE was performed in 150 patients for GI bleeding (n = 97), Crohn's disease (n = 36), and miscellaneous reasons (n = 17).

Main Outcome Measurements: Clinical consequences were evaluated by using a questionnaire and were divided into change of management or unchanged management. Change of medication, endoscopic procedures, surgical procedures, other consequences, and avoidance of additional investigations were considered a change of management. For all patients, an assessment of the actual clinical condition and the most recent Hb level were registered.

Results: A definite diagnosis was established in 34%, a probable diagnosis in 34%, and no diagnosis in 32%. Management was changed in 38% of patients, increasing to 59% if a definite diagnosis was established at VCE. No relation between change of management and clinical improvement or increased Hb level could be established.

Limitations: The start of ethinylestradiol/norethisterone in case of telangiectasia was considered a change of management, although controversy on the rationale of this treatment exists. A more detailed and objective evaluation of the clinical condition should be performed to assess the clinical outcome.

Conclusions: VCE findings have a serious impact on clinical practice. VCE in particular leads to a change of management in 59% of the patients in whom a definite diagnosis is established.
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December 2007

New endoscopic techniques for obscure gastrointestinal bleeding.

Can J Gastroenterol 2007 Sep;21(9):597-600

Department of Gastroenterology, St Antonius Hospital Nieuwegein, The Netherlands.

The case of a postmenopausal woman with a congenital aortic stenosis is presented. She presented with severe iron deficiency anemia. After negative extensive gastrointestinal analysis, she was treated with octreotide for six months. After cessation of octreotide, anemia rapidly recurred. A second capsule endoscopy and a double balloon enteroscopy were performed, and an intestinal vascular malformation was found. After surgical segment resection, the patient had stable, normal levels of hemoglobin and no complaints after 14 months of follow-up.
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September 2007

Assessment of intestinal vascular malformations in patients with hereditary hemorrhagic teleangiectasia and anemia.

Eur J Gastroenterol Hepatol 2007 Feb;19(2):153-8

Department of Gastroenterology, St Antonius Hospital, Nieuwegein, The Netherlands.

Introduction: Hereditary hemorrhagic teleangiectasia (HHT) is an autosomal dominant disorder with mucocutaneous teleangiectasia and visceral arteriovenous malformations. Mutations of endoglin and Activin A receptor like kinase-1 have different phenotypes, HHT1 and HHT2, respectively. The gastrointestinal tract is frequently affected, but limited information is available on the relationship with genotype.

Aim: To determine whether different genotypes have different phenotypes with respect to intestinal teleangiectasia.

Methods: HHT patients, referred for anemia, underwent videocapsule endoscopy. Chart review was performed for information on genotype and HHT manifestations.

Results: Twenty-five patients were analyzed (men/women 13/9, mean age 49+/-15 years.), 14 HHT1, eight HHT2 and three without known mutation. Epistaxis occurred in 96% of patients. Gastroduodenoscopy revealed teleangiectasia in 7/12 (58%) HHT1 and 3/8 (38%) HHT2 patients. Videocapsule endoscopy found teleangiectasia in all HHT1 and 5/8 (63%) HHT2 patients. In 9/14 HHT1 patients, teleangiectasia were large. Teleangiectasia in the colon was restricted to 6/11 (55%) HHT1 patients. Hepatic arteriovenous malformations were present in 1/7 HHT1 and 5/6 HHT2 patients.

Conclusion: Large teleangiectasia in small intestine and colon appear to occur predominantly in HHT1. Hepatic arteriovenous malformations are mainly found in HHT2. In HHT patients with unexplained anemia, videocapsule endoscopy should be considered to determine the size and extent of teleangiectasia and exclude other abnormalities.
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February 2007

Detection of small-bowel neuroendocrine tumors by video capsule endoscopy.

Gastrointest Endosc 2006 Jul;64(1):66-72

Department of Gastroenterology, St. Antonius Hospital, 3430 EM Nieuwegein, The Netherlands.

Objectives: Carcinoid tumors are the most common GI neuroendocrine tumors (NET). They often originate in the small intestine. The primary tumor is often difficult to locate, and resection in an early phase is recommended to prevent complications. This study evaluated the value of videocapsule endoscopy (VCE) in the detection of small-intestinal primary carcinoid tumor.

Design: Prospective descriptive study.

Setting: Tertiary referral center.

Patients: Twenty consecutive patients (13 men, 7 women; 60.5 +/- 9.3 years) with metastatic NET of unknown primary tumor.

Interventions: All patients underwent CT, enteroclysis, nuclear imaging, and VCE of the small bowel.

Results: CTs and enteroclysis did not detect a primary small-intestinal carcinoid tumor. Nuclear imaging demonstrated abnormalities in the abdominal area in 13 patients but was unable to relate this to an intestinal localization in any patient. VCE revealed a small-intestinal tumor in 9 patients. Three other patients showed external compression and erosions. At surgery, 5 patients had a small-intestinal carcinoid tumor, and, in 2 patients, a small-intestinal ischemic segment was present.

Limitations: The number of false-positive VCE findings was not clear, because not all patients underwent surgery. The absence of abnormalities at VCE in patients with abnormalities at nuclear imaging might be related to the presence of carcinoid tumor restricted to the mesenterium or to a false-negative VCE.

Conclusions: VCE had a high diagnostic yield of 45% for identification of primary small-intestinal carcinoid tumors. Although nuclear imaging had a comparable diagnostic yield, it could not differentiate between intestinal and mesenterial localization of the carcinoid.
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July 2006

Severe hepatic side effects of ezetimibe.

Clin Gastroenterol Hepatol 2006 Jul 22;4(7):908-11. Epub 2006 Jun 22.

Department of Gastroenterology, St. Antonius Hospital, Nieuwegein, The Netherlands.

Background And Aims: Ezetimibe was introduced recently as a new class of cholesterol-lowering drugs. Until now only limited increases of transaminase levels were reported.

Methods: We studied 2 patients with severe hepatic side effects of ezetimibe in a general community hospital.

Results: Ezetimibe may lead to 2 distinct types of severe hepatic side effects.

Conclusions: Ezetimibe may rarely cause hepatotoxicity, severe cholestatic hepatitis, or acute autoimmune hepatitis.
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July 2006