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K51.2 Ulcerative Proctitis – ICD-10 Diagnosis
K51.2 is the ICD-10 diagnosis code for ulcerative proctitis, a chronic inflammatory bowel disease limited to the rectum.
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K51.2 is the ICD-10 diagnosis code for ulcerative proctitis, a chronic inflammatory bowel disease limited to the rectum.
What is K51.2 – Ulcerative Proctitis?
K51.2 is the ICD-10 diagnosis code for ulcerative proctitis. It is a subtype of ulcerative colitis in which the chronic inflammation is confined exclusively to the rectum and does not extend to other parts of the colon. It belongs to the group of inflammatory bowel diseases (IBD).
Causes
The exact cause of ulcerative proctitis is not fully understood. A combination of factors is believed to contribute to its development:
- Immune system dysregulation: The immune system mistakenly attacks the lining of the rectum.
- Genetic predisposition: A family history of inflammatory bowel disease increases the risk.
- Altered gut microbiome: Imbalances in intestinal bacteria may promote inflammation.
- Environmental and lifestyle factors: Stress, diet, and certain medications can trigger or worsen flares.
Symptoms
Common symptoms of ulcerative proctitis include:
- Frequent and urgent need to defecate (tenesmus) with passage of small amounts
- Blood and mucus in the stool
- Pain and pressure in the anal and rectal area
- Feeling of incomplete bowel emptying
- Occasional constipation (unlike more extensive forms of ulcerative colitis)
- Mild fatigue or general discomfort
Compared to more extensive forms of ulcerative colitis, ulcerative proctitis often follows a milder course, but it can still significantly affect quality of life and occur in flares.
Diagnosis
Diagnosis of ulcerative proctitis is based on a combination of:
- Medical history and physical examination: Assessment of symptoms and health background.
- Endoscopy (rectoscopy/colonoscopy): Direct visualization of the rectal mucosa; typical findings include redness, friability, and ulceration.
- Biopsy: Tissue samples taken for histological analysis to confirm inflammation.
- Stool tests: To rule out infectious causes of symptoms.
- Blood tests: Measurement of inflammatory markers such as CRP and full blood count.
Treatment
Treatment is tailored to the severity of the disease and the individual response to therapy.
Medical Treatment
- 5-Aminosalicylates (5-ASA / Mesalazine): The first-line treatment, most commonly administered as rectal preparations (suppositories, enemas, or foam) to deliver medication directly to the affected area.
- Corticosteroids: Used when 5-ASA therapy is insufficient or during severe flares, preferably applied locally (rectally) or systemically if needed.
- Immunosuppressants: For steroid-dependent or steroid-refractory cases (e.g., azathioprine).
- Biologics: In severe or treatment-resistant cases, TNF-inhibitors or other biologic agents may be considered.
General Measures
- Stress management and psychosocial support
- Dietary adjustments during active flares
- Regular follow-up appointments with a gastroenterologist
Surgical Treatment
Surgery is rarely required for ulcerative proctitis, but may be considered in exceptional cases with severe complications or complete treatment resistance.
Course and Prognosis
Ulcerative proctitis follows a chronic relapsing-remitting course, alternating between periods of remission and active flares. In some patients, the inflammation may gradually extend to other parts of the colon over time. With consistent and appropriate treatment, many patients achieve good disease control and a high quality of life.
References
- World Health Organization (WHO): ICD-10 Version 2019 – K51 Ulcerative colitis. https://icd.who.int/browse10/
- Dignass A. et al. – Second European evidence-based consensus on the diagnosis and management of ulcerative colitis. Journal of Crohn's and Colitis, 2012.
- Lamb C.A. et al. – British Society of Gastroenterology consensus guidelines on the management of inflammatory bowel disease in adults. Gut, 2019.
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