DISORDERS OF THE ANAL CANAL

 DISORDERS OF THE ANAL CANAL


Disorders of the rectum and anal canal along with their symptoms, management, and investigations:

  1. Haemorrhoids

    • Painful protrusion of the anal mucosa due to constipation and hard stools.
    • Predisposing factors: Low-fiber diet, dehydration, pregnancy, colon cancer, HIV/AIDS, other painful anal conditions.
    • Types:
      • First degree: Internal, no protrusion.
      • Second degree: Protrude during defecation but retract.
      • Third degree: Remain protruded, may thrombose.
    • Complications: Bleeding, thrombosis, ulceration.
    • Management: High-fiber diet, stool softeners; haemorrhoidectomy for third degree.
  2. Anal Fissure

    • Painful anal tear caused by hard stool and poor hygiene.
    • Management: Manual dilatation, fissure scraping with nitroglycerin injection, sitz baths.
  3. Anal Fistula

    • Fibrous tunnel from rectum/anal canal to skin, causing drainage and pain.
    • Causes: Poorly managed abscess, HIV/AIDS, diabetes.
    • Classification: Low-level (below internal sphincter), high-level (involves internal sphincter).
    • Management: Sitz baths, antibiotics, fistulotomy or fistulectomy.
    • Surgical complications: Infection, fecal incontinence.
  4. Ischiorectal Abscess

    • Abscess in the fatty tissue between the ischium and rectum, hard to treat due to poor blood supply.
    • Management: Cruciate incision for proper drainage.
  5. Cancer of the Rectum

    • Second most common GI cancer, usually adenocarcinoma.
    • Risk factors: High-fat diet, age >50, family history.
    • Staging: A (confined) to D (metastasis).
    • Symptoms: Bleeding, lower abdominal pain, bowel changes, weight loss.
    • Management: Examination, biopsy, resection (stages A/B), palliative care (stages C/D).
  6. Hirschsprung Disease

    • Congenital condition with intestinal dilation due to lack of ganglions, causing severe constipation.
    • Diagnosis: Abdominal X-ray, rectal biopsy.
    • Management: Surgical resection of affected segment, followed by anastomosis.
  7. Special Investigations

    • Proctoscopy: Direct visual examination of the rectum using a proctoscope.
    • Colonoscopy: Examination of the colon via a colonoscope to detect ulcers, polyps, and tumors.
    • Barium enema: X-ray examination after contrast media is introduced via the anus to visualize obstructions.
  8. Special Procedures

    • Rectal Lavage: Clearing the rectum for proctoscopy.
    • Enema Administration: Contrast media introduction through the anus for diagnostic imaging.

These disorders involve common complications such as infection, incontinence, and recurrence, requiring careful diagnosis and treatment based on the specific pathology.

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