Number of intraepithelial lymphocytes and presence of a subepithelial band in normal colonic mucosa differs according to stainings and evaluation method.

Chronic watery diarrhea is a frequent symptom. In approximately 10% of the patients, a diagnosis of microscopic colitis (MC) is established. The diagnosis relies on specific, but sometimes subtle, histopathological findings.

Histological disease activity in patients with microscopic colitis is not related to clinical disease activity or long-term prognosis.

Background: Microscopic colitis (MC) is a common cause of chronic watery diarrhea. Biopsies with characteristic histological features are crucial for establishing the diagnosis. The two main subtypes are collagenous colitis (CC) and lymphocytic colitis (LC) but incomplete forms exist.

Quantifying intraepithelial lymphocytes and subepithelial collagen band in microscopic colitis, extracting insights into the interrelationship of lymphocytic and collagenous colitis.

Microscopic colitis (MC) is the umbrella term for the conditions termed lymphocytic colitis (LC) and collagenous colitis (CC). LC with thickening of the subepithelial collagen band or CC with increased number of intraepithelial T- lymphocytes (IELs) is often seen in MC and may lead to difficulties in correct histological classification. We investigated the extent of overlapping features of CC and LC in 60 cases of MC by measuring the exact thickness of the subepithelial collagen band in Van Gieson stained slides and quantifying number of IELs in CD3 stained slides by digital image analysis.

Topographical distribution of microscopic colitis and the importance of orientation of paraffin-embedded biopsies.

The diagnosis of microscopic colitis (MC) relies on specific histopathological findings in colon biopsies. The number of biopsies needed to diagnose MC remains disputed. The aim of the study was to determine the number and site of biopsies necessary for the diagnosis and the effect of perpendicular orientation when embedding the biopsies.

An investigation of European pathologists' approach to diagnose microscopic colitis.

Microscopic colitis (MC) comprising lymphocytic colitis (LC), collagenous colitis (CC) and the incomplete forms of microscopic colitis (MCi) are frequent causes of chronic watery diarrhea. The diagnosis is based on specific histological features in colonic biopsies. Especially regarding MCi, the histological features may be subtle.

Establishment of digital cutoff values for intraepithelial lymphocytes in biopsies from colonic mucosa with lymphocytic colitis.

Background/introduction: Lymphocytic colitis (LC) and the incomplete form (LCi) are common causes of chronic watery diarrhea. Endoscopy is often inconspicuous, and the diagnosis relies on histopathological assessment of colonic biopsies. Digital Image Analysis (DIA) eliminates interobserver variation.

Is revision of cutoff values needed when using CD3 immunohistochemical staining in histopathologic diagnosis of lymphocytic colitis?

Lymphocytic colitis (LC) and LC incomplete (LCi) are common causes of chronic watery diarrhea. The diagnosis relies on clinical findings and histopathologic evaluation. The diagnostic criteria of LC are based on hematoxylin and eosin (HE) staining.

The subtypes of microscopic colitis from a pathologist's perspective: past, present and future.

Microscopic colitis (MC) is a chronic inflammatory bowel disease, encompassing a triad of chronic diarrhea, normal endoscopy and characteristic histological findings. MC embraces two histological subtypes described as lymphocytic colitis (LC) and collagenous colitis (CC). The diagnostic criteria of MC were established several years ago and the histological description of LC and CC was based almost exclusively on heamatoxylin-eosin (HE) stained sections.

Automated image analysis in the study of collagenous colitis.

Purpose: The aim of this study was to develop an automated image analysis software to measure the thickness of the subepithelial collagenous band in colon biopsies with collagenous colitis (CC) and incomplete CC (CCi). The software measures the thickness of the collagenous band on microscopic slides stained with Van Gieson (VG).

Patients And Methods: A training set consisting of ten biopsies diagnosed as CC, CCi, and normal colon mucosa was used to develop the automated image analysis (VG app) to match the assessment by a pathologist.

CD3 immunohistochemical staining in diagnosis of lymphocytic colitis.

Microscopic colitis (MC) is a common cause of chronic watery diarrhea. Traditionally, MC encompasses the 2 subgroups lymphocytic colitis (LC) and collagenous colitis, but recently, an additional subgroup, MC incomplete, has been introduced. Distinguishing between the subgroups relies exclusively on histopathologic evaluation.

The Temporal Evolution of Histological Abnormalities in Microscopic Colitis.

Background And Aims: Microscopic colitis (MC) is a common cause of chronic watery diarrhoea but long-term follow-up data are sparse.

Methods: We performed a retrospective review of health records and all pathology reports in a regional cohort of patients with MC to describe the change in pre- and post-diagnostic colon biopsies.

Results: MC was diagnosed in 468 patients with collagenous colitis (CC), 361 with lymphocytic colitis (LC) and 226 with incomplete MC (MCi).

[The Danish introductory position provides a qualified choice of specialty].

The Danish introductory position is unique. It is placed between internship and the main part of specialist education. Workplace-based assessment according to central objectives is central.

Observer variability in the histopathologic diagnosis of microscopic colitis and subgroups.

The diagnosis of microscopic colitis (MC) is based on histologic findings and includes collagenous colitis (CC) and lymphocytic colitis (LC). Incomplete MC (MCi) denotes patients with chronic diarrhea and a normal endoscopy and morphological changes that do not completely meet the histologic criteria of LC or CC. The aim of this study was to investigate the intraobserver and interobserver agreement on the MC subtypes of CC, LC, and MCi and the ability to discriminate MCi from normal and inflammatory bowel disease/nonspecific reactive changes.

[What is the pedagogical development function of Region East, Denmark used for?].

Implementing a reform of postgraduate medical education in Denmark (2004), a pedagogical development function (PDF) which employs clinical associate professors (CAP) was established. To evaluate the impact of the PDF and the CAP, 1,355 questionnaires were mailed to physicians in eastern Denmark: 687 (51%) replied, 114 (17%) expressed knowledge of the PDF and 75 (11%) reported a personal contact to the PDF. The rather low knowledge of the PDF may be due to the CAPs' involvement in several educational functions at the same time which may impede identification of the ''true" efforts of the CAP/PDF.

Differential expression of hMLH1 in sporadic human colorectal cancer tumors and distant metastases.

Somatic defects in the mismatch repair system constitute an important pathway in colorectal carcinogenesis. We have examined the expression of mismatch repair proteins in sporadic stage IV colorectal tumors and their derived metastases. Sporadic tumors were further examined for differences in expression between the tumor transition zone and the invasive front.

Tacit knowledge and visual expertise in medical diagnostic reasoning: implications for medical education.

Background: Much education--especially at the university level--has been criticized for having primarily dealt with explicit knowledge, i.e. those aspects of mental activities, which are verbal and conscious.