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Benign Anal and Colonic Disorders. Bruce George John Radcliffe Hospital. 16-6-04. Anatomy revision. Factors contributing to normal bowel function. Colonic transit. CNS co-ordination. Sensation. Mechanical barrier. Ability to evacuate. Anal pain Bleeding Discharge Swelling Itching
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Benign Anal and Colonic Disorders Bruce George John Radcliffe Hospital 16-6-04
Factors contributing to normal bowel function Colonic transit CNS co-ordination Sensation Mechanical barrier Ability to evacuate
Anal pain Bleeding Discharge Swelling Itching Leakage Urgency Symptoms of anal pathology
Examination General Abdominal Inspection at rest soiling, excoriation, scars, patulous, guttering squeeze straining perineal descent Rectal examination Proctoscopy and sigmoidoscopy
Investigations Anal canal pressures Sensation Pudendal nerve latency Endoanal ultrasound Rarely: MRI anorectum MRI spine ambulatory pressures
Causes of Anal Pain PILES (thrombosed) ABSCESS FISSURE
Linear ulcer below dentate line midline (if multiple/lateral think of Crohn’s disease) Anal pain During + after defaecation Bleeding Bright red/spotting Anal fissure
Most acute fissures heal spontaneously Assisted by bulking laxatives Non-constipating analgaesica ?lignocaine gel Chronic fissures associated with internal sphincter hypertonia Above + reduction in IAS tone Management
Surgical Anal stretch Internal sphincterotomy Pharmacological GTN botulinum Methods of reducing IAS tone
Acute and chronic manifestations of the same disease proess ACUTE = ABSCESS CHRONIC = FISTULA Anal abscess and fistula
Natural history of perianal abscess • Drainage via anal gland • resolution • Drainage via abnormal route • Resolution of abscess • Creation of fistula • Intersphincteric • Trans-sphincteric • others
Abscess severe anal pain Fistula recurrent discharge cycles of pain/discharge Symptoms
piles Swollen or fragile anal cushions
INJECTION SCLEROTHERAPY • First and Second Degree where bleeding is principle symptom. • Irritant sclerosant solution (phenol in oil) injected into submucosa proximal to each haemorrhoidal plexus • Simple, safe , painless • Complications related to incorrect application. • Long-term success rate - sparsely reported.
RUBBER BAND LIGATION • I / II Degree, some III degree • Barron ligator applies two bands to base of pile. • ? Number of bundles banded per session. • ? Success Rate: 33% relapse in 5 years • Complications • Pain • Bleeding • Postbanding Pelvic Sepsis
Obviously GI COBH, blood PR, distension, abdominal pain, tenesmus Involvement of adjacent structures Fistula to bladder, vagina, skin Back, psoas irritation Extra-colonic manifestations Iritis, erythema nodosum, arthriris, sclerosing cholangitis Symptoms of colonic disease
Examination • General examination • Abdominal examination • Rectal examination
Proctoscopy and rigid sigmoidoscopy Stool examination Flexible sigmoidoscopy Colonoscopy Barium enema CT colon Investigations
Rectal bleeding Change in bowel habit The elderly/frail Suspected diverticular disease Suspected inflammatory bowel disease Who needs which investigations?
25 year old BRRB, associated with straining 50 year old BRRB and mucus 75 year old DRRB
25 year old bloody diarrhoea for 3 months 50 year old constipation and bloating intermittently for 12 months 75 year old COBH and iron deficiency anaemia Change in bowel habit
75 year old increased frequency of bowel movements and LIF pain for 3 months 80 year old change in bowel habit for 3 months Change of bowel habit
Everyone: History and examination including PR Proctoscopy and rigid sigmoidoscopy Rectal bleeding: Rigid/flexi/colonoscopy (safety margin) Change in bowel habit: Usually barium enema Colonoscopy if suspected IBD or high index suspicion cancer Top and tail if iron deficiency anaemia CT colon if frail Stool cultures if diarrhoea Summary
Diverticular disease Crohn’s disease Ulcerative colitis The common benign colonic diseases
Diverticular disease Disease of modern elderly Western population Lack of dietary fibre roller milling of wheat flour geographical differences in fibre intake Oxford vegetarian study
Spectrum of diverticular disease • Diverticulosis • Asymptomatic • symptomatic • Diverticulitis • Uncomplicated • Acute complicated (hinchey 1-4) • Fistulating • stricturing • Diverticular haemorrhage
Diverticulosis Make diagnosis accurately High fibre diet Treatment of Diverticular Disease
Acute uncomplicated and Hinchey 1-2 Aim to avoid acute surgery Intravenous fluids and antibiotics Radiological drainage of contained abscess(es) When acute episode settled: Visualise colon (DCBE/colonoscopy) Consider surgery Treatment of diverticulitis
Hinchey 3-4 Resuscitation and emergency surgery Fistula Surgery soon Stricture Complete obstruction: urgent surgery Partial obstruction: surgery soon Treatment of diverticulitis
Chronic inflammatory bowel disease 40% terminal ileum/caecum 30% small bowel 30% colonic 20-80% anal disease, especially in association with rectal or colonic inflammation Crohn’s disease
Crohn’s disease Skip lesions Cobblestone appearance, fissures, ulceration Transmural inflammation
Medical Steroids 5-ASA drugs Immunosuppressants (azathioprine) Nutritional Enteral TPN Surgical Treatment of Crohn’s disease
Failure of medical therapy Chronic complications Abscess, fistula, obstruction Dangerous acute complications Perforation, dilatation, haemorrhage Risk of developing malignancy Indications for surgery for Crohn’s colitis
Ulcerative Colitis • Chronic inflammatory condition of large bowel • Dentate line extending proximally in continuous fashion • Disease of mucosa only