Small bowel (small intestine)
Malabsorption
Celiac sprue

Author: Erdener Özer, M.D., Ph.D. (see Authors page)

Revised: 6 June 2017, last major update June 2017

Copyright: (c) 2002-2017, PathologyOutlines.com, Inc.

PubMed Search: Celiac sprue [title]

Cite this page: Celiac sprue. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/smallbowelceliacsprue.html. Accessed July 20th, 2017.
Definition / general
  • Chronic inflammatory disorder of the small intestine characterized by malabsorption after ingestion of gluten in individuals with a certain genetic background
  • Major cause of malabsorption
Essential features
  • Increased numbers of lymphocytes infiltrate the epithelium (intraepithelial lymphocytosis)
  • Partial or total atrophy of intestinal villi and hyperplasia of intestinal crypts with chronic inflammation in the lamina propria
Terminology
  • Celiac disease
  • Nontropical sprue
  • Gluten sensitive enteropathy
  • Gluten induced enteropathy
ICD-10 coding
  • K90.0
Epidemiology
Pathophysiology
  • Damage to the intestinal mucosa occurs with the presentation of gluten derived peptide gliadin by HLA molecules to helper T cells, which mediate the inflammatory response, causing epithelial damage
  • Destruction of the intestinal absorptive surface leads to malabsorption
Etiology
  • Celiac disease results from a combination of immunological responses to an environmental factor (gliadin) and genetic factors (Dig Liver Dis 2011;43:S385)
  • It has a strong hereditary component; the prevalence of the condition in first degree relatives is approximately 10% (Dig Liver Dis 2011;43:S385)
  • A strong association exists between celiac disease and HLA haplotypes DQ2 and DQ8 (Dig Liver Dis 2011;43:S385)
Diagrams / tables

Modified Marsh-Oberhuber classification of histologic findings in celiac disease

Marsh
Type
IEL / 100
enterocytes - jejunum
EL / 100
enterocytes - duodenum
Crypt
hyperplasia
Villi
0 < 40 < 30 Normal Normal
1 > 40 > 30 Normal Normal
2 > 40 > 30 Increased Normal
3a > 40 > 30 Increased Mild atrophy
3b > 40 > 30 Increased Marked atrophy
3c > 40 > 30 Increased Complete atrophy
IEL: intraepithelial lymphocytes

Images hosted on other servers:

Comparison of
four classification
schemes

Differential Diagnosis of Celiac Disease

Clinical features
  • The variety of clinical manifestations complicates its recognition:
    • Malabsorption syndrome with repeated diarrhea-like bowel movements, abdominal pain and marked weight loss
    • Dermatitis herpetiformis
  • Endoscopy may show scalloping or flattening of duodenal folds, fissuring over the folds and a mosaic pattern of mucosa of folds
Diagnosis
  • Correct diagnosis requires precise evaluation of clinical, serological, genetic and histological aspects
  • Laboratory tests include elevated IgA class antitransglutaminase antibodies (tTGA), IgA class antiendomysial antibodies (EMA) and IgA class antigliadin antibodies (AGA)
  • Individuals with seronegative disease may show histologic changes
  • Intestinal biopsies from the first and second duodenal portion are essential to confirm the diagnosis
  • Genetic testing for histocompatibility antigens (HLA) is never diagnostically significant
Laboratory
Prognostic factors
  • The prognosis for patients with correctly diagnosed and treated celiac disease is excellent
  • Complications that can be confirmed histologically:
    • Refractory sprue
    • Collagenous sprue
    • Ulcerative jejunoileitis
    • Lymphoma
  • Have increased risk for malignancy, including enteropathy associated T cell lymphoma and adenocarcinoma of the intestinal tract
Case reports
Treatment
  • The primary management of celiac disease is dietary
  • Complete elimination of gluten containing grain products (including wheat, rye and barley) is essential to treatment
Clinical images

Images hosted on PathOut server:

Normal vs. flattened mucosa
By Erdener Özer, M.D., Ph.D.

Microscopic (histologic) description
  • The histological "elementary lesions" are (Dig Liver Dis 2011;43:S385, Semin Diagn Pathol 2014;31:124):
    • Increased intraepithelial T lymphocytes (IEL): 25 to 29 IEL/100 enterocytes is considered borderline; > 30 IEL/100 enterocytes represents a pathological "lymphocytosis"
    • Decreased enterocyte height, flattening of enterocytes, intracytoplasmic vacuolation and reduction or absence of brush border are suggestive but not specific
    • Crypt hyperplasia: extension of the regenerative epithelial crypts associated with changes in the presence of more than 1 mitosis per crypt
    • Villous atrophy: decrease in villous height, alteration of normal crypt / villous ratio (3:1) until total disappearance of villi; this assessment requires proper orientation of the biopsies
  • Diagnostic categories are based on these elementary lesions:
  • Different grades of duodenal mucosal lesions:
    • Grade A / Type 1: increased intraepithelial lymphocytes but no villous atrophy
    • Grade B1 / Type 2: villi still present but shortened
    • Grade B2 / Type 3: complete villous atrophy
Microscopic (histologic) images

Images hosted on PathOut server:

Normal vs. Marsh type IIIb/IIIC
Contributed by Erdener Özer, M.D., Ph.D.


Response to gluten free diet; collagenous sprue
Contributed by Dr. Arzu Ensari


56 year old woman - case #127



Images hosted on other servers:

Marsh-Oberhuber classification

Various images

Marsh Type I & III lesions

Differential diagnosis
  • Many disorders nave similar architectural abnormalities or intraepithelial lymphocytosis, but those most likely encountered by pathologists are:
    • Autoimmune enteropathy: histologic findings of villous flattening and crypt hyperplasia are similar to celiac disease
    • Crohn disease
    • Chronic H. pylori associated duodenitis: Helicobacter pylori gastritis can cause an increase in IELs in the duodenal bulb, leaading to diagnostic confusion with celiac disease
    • Food allergy: hypersensitivity to food antigens other than gluten, including cow's milk, soy protein, fish, rice and chicken may also be associated with increased numbers of IELs, as well as architectural changes in the form of patchy or diffuse disease
    • Infections: a wide variety of infectious agents including viruses, parasites and bacteria can affect small intestinal mucosa
Board review question #1
Which histological feature is most common in celiac disease?

  1. Crypt hyperplasia
  2. Granulomas
  3. Intraepithelial lymphocytosis
  4. Mucosal eosinophilia
  5. Villous atrophy
Board review answer #1
C. Intraepithelial lymphocytosis. All celiac disease patients except for those with Marsh type 0 show Intraepithelial lymphocytosis.