Peter Ingeholm

Herlev Hospital, Herlev, Capital Region, Denmark

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Publications (12)98.31 Total impact

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    ABSTRACT: Introduction: Colorectal cancer is a common malignant disease, caused by different aetiologies and molecular pathways. Heterogeneous results have been published regarding the association of microsatellite instability and clinicopathological features. The aim of this study was to compare clinicopathological features of microsatellite unstable tumours with stable ones. Methods: Data were collected retrospectively, but the pathological analyses were all made prospectively. The study included a total of 833 patients undergoing resection of their colon tumour at Nordsjællands Hospital - Hillerød, with mismatch repair analysis from 1 January 2007 to 30 November 2012. The study was performed in a setting with complete mesocolic excision surgery and post-operative expert pathological examination of the tumours. Mismatch repair analysis was done by immuno-histochemical staining for the mismatch repair proteins: pMLH1, pMSH2, pMSH6 and pPMS2 for the determination of microsatellite instability. Microsatellite instability was defined as deficient expression of one or more of these proteins. Results: Of the 833 patients, 177 had microsatellite instable tumours (21%). Using multivariable logistic regression analysis, we demonstrated that microsatellite unstable cancers were significantly associated with a lower degree of lymph node metastases (odds ratio (OR) = 0.92), distant metastases (OR = 0.33) and tumour budding (OR = 0.41). Conclusions: We found that microsatellite unstable tumours show a pathological profile that appears less aggressive than the pathological profile of stable tumours. Funding: none. Trial registration: not relevant.
    No preview · Article · Feb 2016 · Danish Medical Journal
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    ABSTRACT: Application of the principles of total mesorectal excision to colon cancer by undertaking complete mesocolic excision (CME) has been proposed to improve oncological outcomes. We aimed to investigate whether implementation of CME improved disease-free survival compared with conventional colon resection. Data for all patients who underwent elective resection for Union for International Cancer Control (UICC) stage I-III colon adenocarcinomas in the Capital Region of Denmark between June 1, 2008, and Dec 31, 2011, were retrieved for this population-based study. The CME group consisted of patients who underwent CME surgery in a centre validated to perform such surgery; the control group consisted of patients undergoing conventional colon resection in three other hospitals. Data were collected from the Danish Colorectal Cancer Group (DCCG) database and medical charts. Patients were excluded if they had stage IV disease, metachronous colorectal cancer, rectal cancer (≤15 cm from anal verge) in the absence of synchronous colon adenocarcinoma, tumour of the appendix, or R2 resections. Survival data were collected on Nov 13, 2014, from the DCCG database, which is continuously updated by the National Central Office of Civil Registration. The CME group consisted of 364 patients and the non-CME group consisted of 1031 patients. For all patients, 4-year disease-free survival was 85·8% (95% CI 81·4-90·1) after CME and 75·9% (72·2-79·7) after non-CME surgery (log-rank p=0·0010). 4-year disease-free survival for patients with UICC stage I disease in the CME group was 100% compared with 89·8% (83·1-96·6) in the non-CME group (log-rank p=0·046). For patients with UICC stage II disease, 4-year disease-free survival was 91·9% (95% CI 87·2-96·6) in the CME group compared with 77·9% (71·6-84·1) in the non-CME group (log-rank p=0·0033), and for patients with UICC stage III disease, it was 73·5% (63·6-83·5) in the CME group compared with 67·5% (61·8-73·2) in the non-CME group (log-rank p=0·13). Multivariable Cox regression showed that CME surgery was a significant, independent predictive factor for higher disease-free survival for all patients (hazard ratio 0·59, 95% CI 0·42-0·83), and also for patients with UICC stage II (0·44, 0·23-0·86) and stage III disease (0·64, 0·42-1·00). After propensity score matching, disease-free survival was significantly higher after CME, irrespective of UICC stage, with 4-year disease-free survival of 85·8% (95% CI 81·4-90·1) after CME and 73·4% (66·2-80·6) after non-CME (log-rank p=0·0014). Our data indicate that CME surgery is associated with better disease-free survival than is conventional colon cancer resection for patients with stage I-III colon adenocarcinoma. Implementation of CME surgery might improve outcomes for patients with colon cancer. Tvergaards Fund and Edgar and Hustru Gilberte Schnohrs Fund. Copyright © 2014 Elsevier Ltd. All rights reserved.
    No preview · Article · Dec 2014 · The Lancet Oncology
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    ABSTRACT: Long-term survival after colorectal cancer may be improved by more extensive resection of the primary tumor and lymph nodes. Resection of the gastroepiploic and infrapyloric lymph nodes in the gastrocolic ligament has been proposed as a standard procedure when resecting tumors located in the proximity of the flexures or in the transverse colon.
    No preview · Article · Jul 2014 · Diseases of the Colon & Rectum
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    ABSTRACT: For years, the outcome of colorectal cancer (CRC) surgery has been inferior in Denmark compared to its neighbouring countries. Several strategies have been initiated in Denmark to improve CRC prognosis. We studied whether there has been any effect on postoperative mortality based on the information from a national database. Patients who underwent elective major surgery for CRC in the period 2001-2011 were identified in the national Danish Colorectal Cancer Group database. Thirty-day mortality rates were calculated and factors with impact on mortality were identified using logistic regression analysis. In total, 27,563 patients underwent elective major surgery and their 30-day mortality rate decreased significantly from 7.3 % in 2001-2002 to 2.8 % in 2011 (P < 0.001). Aside from the year of surgery, independent risk factors of mortality were male gender, age ≥61 years, American Society of Anesthesiologists score ≥ II, tumor located in the colon, palliative intent, outcome of surgery "not cured," and open surgical approach. Additionally, 3-month mortality of all 37,022 CRC patients, irrespective of surgical treatment, decreased significantly from 15.8 to 11.3 % during the study period. The 30-day mortality rate after elective major surgery for CRC has decreased significantly in Denmark in the past decade. Laparoscopic surgical approach was associated with a reduction in mortality in colon cancer.
    No preview · Article · Mar 2014 · Annals of Surgical Oncology
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    ABSTRACT: Colorectal cancer is a common disease with over 41 000 new cases diagnosed every year in the UK, of which around two-thirds occur in the colon. The primary treatment for colon cancer is surgery, though outcomes vary substantially worldwide. Centres in Germany and Japan using complete mesocolic excision with central vascular ligation (CME with CVL) report some of the best outcomes after colon cancer resection in published research. We aimed to identify the optimum surgical technique for colon cancer and determine whether it could be implemented into routine practice.
    No preview · Article · Feb 2014 · The Lancet
  • Ismail Gögenur · Peter Ingeholm · Lene Hjerrild Iversen

    No preview · Article · Oct 2012 · Ugeskrift for laeger
  • Rikke Karlin Jepsen · Peter Ingeholm · Eva Løbner Lund
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    ABSTRACT: Jepsen R K, Ingeholm P & Lund E L (2012) Histopathology 61, 788–794 Upstaging of early colorectal cancers following improved lymph node yield after methylene blue injection Aims: To evaluate whether the use of intra-arterial methylene blue injection improves lymph node yield, and to determine whether a higher lymph node count results in upstaging in colorectal cancer. Method and results: We performed a retrospective study of colorectal cancer specimens (n = 234) 1 year after implementation of the method. All colorectal cancer specimens from the previous year served as our control group. Data concerning tumour characteristics, lymph node count, number of positive lymph nodes and success of methylene injection had been prospectively collected in accordance with the department’s ongoing registration. The method was easy to implement and perform with a high rate of success (86%). The number of identified lymph nodes was highly significantly improved in the study group (P < 0.0001). In resections with pT1/T2 tumours, we demonstrated a significant increase in the number of resection specimens containing positive lymph nodes, with an increase in pN1 resections from 9.4% in the control group to 26.7% in the study group (P = 0.04). Conclusions: The methylene blue technique significantly improves lymph node identification in colorectal cancer specimens, and the improved lymph node identification leads to upstaging of International Union Against Cancer (UICC) pT1/pT2 cancers.
    No preview · Article · Mar 2012 · Histopathology
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    ABSTRACT: Klarskov L, Mogensen AM, Jespersen N, Ingeholm P, Holck S. Filiform serrated adenomatous polyposis arising in a diverted rectum of an inflammatory bowel disease patient. APMIS 2011; 119: 393–8. A 54-year-old man, previously colectomized for inflammatory bowel disease, developed carcinoma in the inflamed rectum stump. The malignant growth was surrounded by a filiform polyposis, grossly considered as pseudopolyps. The histology disclosed, however, a morphology corresponding to the recently described filiform subset of serrated adenoma (FSA). The clustering of the FSA amounted to a filiform serrated adenomatous polyposis, a hitherto unreported observation. It is speculated that neoplastic transformation of pre-existing pseudopolyps and prolaps-related events lead to this peculiar morphology. Minor zones with a villous structure were admixed as were small areas of traditional serrated adenoma and patches of flat dysplasia. Although a combined gastric and intestinal (positivity for MUC5AC, MUC2, MUC6, CDX2) immunoprofile characterized the adenomatous component, a downregulation of the gastric mucin along with a loss of the serrated attribute accompanied the malignant transformation. An added dynamic shift during the adenoma carcinoma sequence included the acquisition of CK7 expression in the malignant portion. Gastric mucin may play a role in the initial step of the neoplastic evolution and CK7 may denote neoplastic progression. This case confirms the notion of a widely variegated morphology of precursor lesions of colorectal carcinoma arising in a chronically inflamed bowel as opposed to the generally more monotonous appearance of adenomas in a sporadic context.
    No preview · Article · Jun 2011 · Apmis
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    ABSTRACT: Recent evidence has demonstrated the importance of dissection in the correct tissue plane for the resection of colon cancer. We have previously shown that meticulous mesocolic plane surgery yields better outcomes and that the addition of central vascular ligation produces an oncologically superior specimen compared with standard techniques. We aimed to assess the effect of surgical education on the oncological quality of the resection specimen produced. We received clinicopathological data and specimen photographs from 263 resections for primary colon cancer from 6 hospitals in the Capital and Zealand regions of Denmark before a national training program. Ninety-three cases were from Hillerød Hospital, where surgeons had previously implemented a surgical educational training program in complete mesocolic excision with central vascular ligation and adopted the procedure as standard practice. The specimen photographs were assessed for the plane of surgery and tissue morphometry was performed. Hillerød specimens had a higher rate of mesocolic plane surgery (75% vs 48%; P < .0001) compared with the other hospitals. The surgeons at Hillerød Hospital also removed a greater length of colon in both fresh (median, 315 vs 247 mm; P < .0001) and fixed (269 vs 207 mm; P < .0001) specimens with a greater distance between the tumor and the closest vascular tie in both fresh (105 vs 84 mm; P = .006) and fixed (82 vs 67 mm; P = .002) specimens. This resulted in the removal of more mesentery in both fresh (14,466 vs 8706 mm; P < .0001) and fixed (9418 vs 6789 mm; P < .0001) specimens and a greater median lymph node yield (28 vs 18; P < .0001). We have shown that adoption of complete mesocolic excision with central vascular ligation results in a change to the production of an oncologically superior specimen compared with standard techniques. This should improve outcomes toward those reported by centers that have long practiced meticulous colon cancer surgery.
    Full-text · Article · Dec 2010 · Diseases of the Colon & Rectum
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    ABSTRACT: we analysed the influence of standardization of colon cancer surgery with complete mesocolic excision (CME) on the quality of surgery measured by the pathological end-points of number of harvested lymph nodes, high tie of supplying vessels, plane of mesocolic resection and rate of R0 resection. One hundred and ninety-eight patients with colonic carcinoma who underwent radical surgery between September 2007 and February 2009 were divided into two groups, including those undergoing surgery before (93) or after (105) 1 June 2008, when complete mesocolic excision (CME) was introduced as standard in our hospital. The overall mean high tie increased from 7.1 (CI, 6.5-7.6) to 9.6 (8.9-10.3) cm (P<0.0001) and the mean number of harvested lymph nodes from 24.5 (22.8-26.2) to 26.7 (24.6-28.8) (P=0.0095). There were no significant increases in these end-points in open right hemicolectomy, and in laparoscopic sigmoid resection the number of lymph nodes did not increase significantly. The plane of mesocolic resection, the rate of R0 resection and the risk of complications did not change significantly. The median (range) length of hospital stay increased from 4 (2-62) to 5 (2-71) days (P=0.04). Standardization of colonic cancer surgery with CME seems to improve the quality of surgery without increasing the risk of complications.
    No preview · Article · Oct 2010 · Colorectal Disease
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    Signe Ledou Nielsen · Peter Ingeholm · Susanne Holck · Ian Talbot

    Full-text · Article · Nov 2007 · Journal of Clinical Pathology
  • Susanne Holck · Peter Ingeholm

    No preview · Article · Apr 2007 · American Journal of Surgical Pathology

Publication Stats

123 Citations
98.31 Total Impact Points


  • 2014
    • Herlev Hospital
      • Department of Pathology
      Herlev, Capital Region, Denmark
    • University of Copenhagen Herlev Hospital
      Herlev, Capital Region, Denmark
  • 2010-2012
    • Hillerød Hospital
      Hillerød, Capital Region, Denmark