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Peripheral Neuropathy 

Microscopic Slide of Lymphocytic Colitis. Courtesy Quizlet.com
Microscopic  Slide of Biopsy Sample Showing Lymphocytic Colitis. Courtesy Quizlet.com

What Is Lymphocytic Colitis?

[dropcap]L ymphocytic colitis is a microscopic inflammation of the large intestinal mucosa with infiltration of lymphocytes (IELs)  that is characterized by non-bloody secretory diarrhea.

Secretory diarrhea describes bowel movements that consist of a large volume of liquid stool.

Q: What are IELs?

A: IELs is an abbreviation for intraepithelial lymphocytes, which are white blood cells that infiltrate within epithelial cells or between them. Epithelial cells form the surface mucosa of the large intestine also called the colon.

The histopathological criteria (biopsy) for lymphocytic colitis are a density of at least 20 IELs per 100 surface epithelial cells; chronic inflammatory infiltrate of mononuclear cells in the lamina propria; epithelial damage; and a subepithelial collagen layer of less than 10 µm. The increased collagen band consists basically of collagen type I and III, which are the subtypes produced by repair functions, indicating a reactive origin.1That is, the mucosa is reacting to some irritative substance.

Up to 10% of adults undergoing colonoscopy for investigation of chronic diarrhea and having visibily normal appearing mucosa may have lymphocytic colitis.2

Bile acid malabsorption has been shown to coexist in 60% of patients with lymphocytic colitis.1

Lymphocytic colitis (LC) is categorized as primary or secondary.  Primary LC is a clinical and histopathological disease of unknown cause. Secondary LC may develop as the result of iritating factors acting on the colon such as smoking or many medications.  In one study, the most common drug treatments as a percentage of the study group were corticosteroids (32.1%), proton pump inhibitors (26.0%), antidepressant drugs, specifically selective serotonin reuptake inhibitors (21.4%), angiotensin-converting enzyme inhibitors or angiotensin II receptor antagonists (18.3%), statins (17.6%), thyroid hormones (17.6%), and beta-blockers (16.0%).3

Secondary lymphocytic colitis is associated with several concomitant diseases including celiac disease. This is why lymphocytic changes must be interpreted with caution before considering them as a separate entity of autoimmune origin, instead of secondary reactions to ischemia and toxic stimulants. Efforts must be made to better classify and diagnose patients with real, primary lymphocytic colitis to avoid over-prescription of corticosteroids for treatment.3

What Is Lymphocytic Colitis In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Ohlsson B. New insights and challenges in microscopic colitis. Therap Adv Gastroenterol. 2015 Jan;8(1):37-47. doi: 10.1177/1756283X14550134. [↩] [↩]
  2. Abdo AA, Urbanski SJ, Beck PL. Lymphotcytic and collagenous colitis: the emerging entity of microscopic colitis. An update on pathophysiology, diagnosis and management. Canadian Journal of Gastroenterology. Jul 2003;17(7):425-32. [↩]
  3. Roth B, Manjer J, Ohlsson B. Drug Target Insights. 2013 Aug 11;7:19-25. doi: 10.4137/DTI.S12109. [↩] [↩]

Hypotonia

In this photo, the spleen is the darkish oval organ in the lower middle of this photo. In your body, it is located in your upper abdoman to the left of your stomach under your ribs.
The spleen is the darkish oval organ in the lower middle of this photo.

What Is Hyposplenism?

[dropcap]H yposplenism is the condition resulting from having lost spleen tissue, called atrophy of the spleen. Spleen atrophy impairs splenic functions or activities because there are insufficient tissues to do the work required.

Q: What splenic functions are impaired?

A: The spleen, apart from acting as a phagocytic filter, thus removing aging and damaged cells, is crucial in regulating immune homeostasis by linking innate and adaptive immunity, and in protecting against infections by encapsulated bacteria.1

Impaired function of the spleen therefore increases risk of infections with encapsulated bacteria because of inability to mount a proper defense and to filter and remove bacteria from the circulation.

The spleen is a highly vascular and solid organ about the size of a fist. It has a delicate structure inside that is enclosed by fibrous, elastic layers consisting of connective tissue.

The tissues within are made up of two different types of tissues, called white pulp and red pulp. White pulp carries out lymphoid functions. Red pulp filters and cleanses the blood. The spleen is situated above the stomach on the left side of the upper abdomen and firmly fixed in place by ligaments and ribs.

The spleen is an important organ of the lymph system, having the largest collection of lymph tissue in the body. It functions to produce antibodies (immunoglobulins) and white blood cells (T-cells and B-cells), help control the amount of blood in the body, keep body fluids in balance, destroy and filter out old and damaged cells2 and salvage the iron needed for producing new blood cells, and lastly, clear bacteria through production of substances that enable phagocytosis (engulfing bacteria and other unwanted particles, such as antigens, from blood).

Children and adults with hyposplenism are at risk for overwhelming infections. Management of hypospenism is directed towards preventing pneumonia by immununization against pneumonia and meningitis and treating bacterial infections as they arise, which may require hospitalization. For some patients, life-long treatment with antibiotics, such as erythromycin and penicillin, are recommended.

What Is Hyposplenism In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Di Sabatino A, Brunetti L, Carnevale Maffè G, Giuffrida P, Corazza GR. Is it worth investigating splenic function in patients with celiac disease? World J Gastroenterol. 2013 Apr 21;19(15):2313-8. doi: 10.3748/wjg.v19.i15.2313. [↩]
  2. http://www.nlm.nih.gov/medlineplus/spleendiseases.html [↩]