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K57.1 - Diverticulosis of the Small Intestine | ICD-10
K57.1 is an ICD-10 diagnosis code for diverticulosis of the small intestine without perforation or abscess. Small pouches in the intestinal wall that usually cause no symptoms.
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K57.1 is an ICD-10 diagnosis code for diverticulosis of the small intestine without perforation or abscess. Small pouches in the intestinal wall that usually cause no symptoms.
What Does K57.1 Mean?
The ICD-10 code K57.1 refers to diverticulosis of the small intestine without perforation or abscess. Diverticula are small, pouch-like protrusions of the intestinal wall that form when the inner mucosal layer pushes outward through weak spots in the muscular layer. In K57.1, these protrusions are located in the small intestine, and there is neither a perforation (a hole through the intestinal wall) nor an abscess (a collection of pus).
Causes and Risk Factors
The exact cause of diverticulosis of the small intestine is not fully understood. The following factors are considered to contribute to its development:
- Low-fiber diet: Insufficient dietary fiber leads to increased pressure inside the intestine, promoting the formation of diverticula.
- Elevated intraluminal pressure: Chronic constipation and straining during bowel movements increase pressure on the intestinal wall.
- Age-related changes: The intestinal wall loses elasticity and strength with increasing age.
- Genetic predisposition: A familial tendency has been observed.
- Connective tissue disorders: Conditions such as Marfan syndrome or Ehlers-Danlos syndrome can increase susceptibility.
Symptoms
Diverticulosis of the small intestine is asymptomatic in most cases, meaning it causes no complaints and is often discovered incidentally during examinations for other reasons. When symptoms do occur, they may include:
- Non-specific abdominal pain or a feeling of pressure in the abdomen
- Bloating and a feeling of fullness
- Changes in bowel habits (diarrhea or constipation)
- Nausea
- In rare cases: malabsorption of nutrients due to bacterial overgrowth within the diverticula (blind loop syndrome)
Distinction: Diverticulosis vs. Diverticulitis
It is important to distinguish between diverticulosis (the mere presence of diverticula, as in K57.1) and diverticulitis (inflammation of the diverticula). In K57.1, there is no inflammation, perforation, or abscess formation. Such complications would be coded using other ICD-10 codes (e.g., K57.0 or K57.2).
Diagnosis
Since K57.1 usually presents without symptoms, the diagnosis is often made as an incidental finding. Diagnostic procedures include:
- Capsule endoscopy: Swallowing a small camera capsule that images the inside of the small intestine.
- MRI enteroclysis / CT enteroclysis: Imaging techniques used to visualize the small intestine.
- Balloon enteroscopy: Endoscopic examination of the small intestine when there is a specific suspicion.
- Contrast radiography: To visualize intestinal pouches using X-ray and contrast medium.
Treatment
For uncomplicated diverticulosis of the small intestine (K57.1) without symptoms, no specific treatment is usually required. The following measures are generally recommended:
- High-fiber diet: To reduce intraluminal pressure and help prevent complications.
- Adequate fluid intake: Supports intestinal transit and prevents constipation.
- Regular physical activity: Promotes healthy bowel function.
- Treatment of malabsorption: If bacterial overgrowth is present, antibiotics may be prescribed.
- Surgical intervention: Required only in very rare cases involving serious complications.
References
- World Health Organization (WHO): ICD-10 International Statistical Classification of Diseases and Related Health Problems, 10th Revision - K57: Diverticular disease of intestine. Available at: www.who.int
- Longo, D.L. et al.: Harrison's Principles of Internal Medicine, 21st Edition, McGraw-Hill Education, 2022.
- Stollman, N. and Raskin, J.B.: Diverticular disease of the colon. The Lancet, 363(9409):631-639, 2004. DOI: 10.1016/S0140-6736(04)15597-9.
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