Colorectal & General Surgery

Conditions managed

Whether you've been referred with a diagnosis or are trying to make sense of your symptoms, find your condition below for plain-language information on causes, treatment options, and what surgery — if needed — actually involves.

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Cancer & Screening
Bowel cancer
The second most common cancer in Australia, very treatable when detected early. Treated with surgery to remove the cancer — laparoscopic and robotic-assisted approaches are used where possible.
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Cancer & Screening
Bowel polyps
Abnormal growths from the bowel lining. Adenomatous polyps can become cancerous if not removed. Detected and excised at colonoscopy with ongoing surveillance as needed.
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Cancer & Screening
Positive FOBT
A positive faecal occult blood test requires investigation — most commonly colonoscopy — to exclude bowel cancer, polyps, and other sources of bowel bleeding.
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Cancer & Screening
Iron deficiency anaemia
Iron deficiency with or without anaemia can be a sign of occult bowel pathology including cancer or polyps. Assessment typically involves colonoscopy and gastroscopy to identify a source.
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Cancer & Screening
Anal cancer
A less common cancer of the anal canal, distinct from bowel cancer. Most are linked to HPV and are very treatable with chemoradiotherapy when caught early — surgery is reserved for refractory or recurrent disease.
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Cancer & Screening
Familial bowel cancer syndromes
Lynch syndrome, FAP, MUTYH-associated polyposis and related conditions markedly raise lifetime bowel cancer risk. Identifying these syndromes allows earlier surveillance and consideration of risk-reducing surgery.
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Anorectal
Haemorrhoids (piles)
Enlarged vascular cushions causing rectal bleeding, discomfort and prolapse. Treatments range from in-rooms procedures like rubber band ligation through to day-surgery options including HALRAR, Rafaelo and haemorrhoidectomy.
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Anorectal
Anal fissures
A tear in the anal canal lining causing severe pain and bleeding with bowel movements. Most respond to topical treatment; a short procedure is available for refractory cases.
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Anorectal
Perianal abscess & fistula
An abnormal tract from the anal canal to the skin, often preceded by a perianal abscess. Requires surgical drainage or repair to prevent recurrence and protect continence.
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Anorectal
Pilonidal disease
A cyst or sinus at the top of the buttocks crease containing hair and debris, prone to abscess formation. Acute abscesses are drained; chronic sinuses require definitive excision.
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Anorectal
Pruritus ani
Persistent perianal itching arising from dietary irritants, haemorrhoids, skin conditions, or infection. A thorough assessment identifies a treatable cause in the majority of patients.
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Anorectal
Crohn's perianal disease
Around one in three patients with Crohn's develops perianal disease — fistulas, abscesses, atypical fissures. Best managed by combined medical-surgical teams. Setons, biologic therapy and selective definitive surgery are the mainstays.
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Bowel & Pelvic Floor
Diverticular disease
Pouches that form in the bowel wall (diverticula) can cause pain or become infected (diverticulitis). Managed with diet and antibiotics; surgery reserved for complicated or recurrent cases.
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Bowel & Pelvic Floor
Inflammatory bowel disease
Crohn's disease and ulcerative colitis are chronic inflammatory conditions of the bowel. Complex IBD requiring surgery — including resections and stoma formation — is managed in close partnership with your gastroenterologist.
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Bowel & Pelvic Floor
Disaccharidase deficiency
Small-bowel enzyme deficiencies (lactase, sucrase-isomaltase and others) that cause bloating, gas, pain and diarrhoea after meals. Often mislabelled as IBS. Diagnosed with a disaccharidase assay on biopsies taken at gastroscopy.
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Bowel & Pelvic Floor
Irritable bowel syndrome (IBS)
A common, real and often debilitating condition — but a diagnosis of exclusion. The surgical role is to rule out anatomical and inflammatory causes; long-term management is then led by a gastroenterologist or your GP.
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Bowel & Pelvic Floor
Constipation
Chronic difficulty with bowel emptying, including slow transit constipation. Managed stepwise from dietary measures and laxatives through to surgery for refractory cases.
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Bowel & Pelvic Floor
Faecal incontinence
Difficulty controlling bowel movements affecting quality of life. Treatable with pelvic floor physiotherapy, dietary changes, biofeedback or surgery depending on the underlying cause.
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Bowel & Pelvic Floor
Rectal prolapse
The rectum protrudes through the anus, causing discomfort, mucus discharge and leakage. Corrected surgically via abdominal rectopexy or perineal approaches depending on fitness.
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Bowel & Pelvic Floor
Rectocele & obstructed defaecation
A weakness allowing the rectum to bulge into the vagina is a common cause of obstructed defaecation syndrome (ODS). Most patients improve substantially with pelvic floor physiotherapy; surgery is reserved for selected cases.
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Bowel & Pelvic Floor
Adhesions & recurrent SBO
Internal scar tissue forms after abdominal surgery and can cause small bowel obstruction, sometimes years later. Most episodes settle without surgery; operative adhesiolysis is reserved for those that don't.
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Bowel & Pelvic Floor
Pelvic floor dysfunction
An umbrella term covering obstructed defaecation, incontinence, prolapse and chronic pelvic pain. Most patients improve substantially with structured assessment and specialised pelvic floor physiotherapy.
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General Surgery
Hernia
A weakness in the abdominal wall allowing internal contents to bulge through. Types include inguinal, umbilical and incisional hernias. Repaired laparoscopically or open with mesh.
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General Surgery
Gallstones & gallbladder disease
Stones in the gallbladder causing pain, nausea or serious infection (cholecystitis). Treated by laparoscopic cholecystectomy — a common day-procedure with a well-established safety record.
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General Surgery
Lumps & bumps
Skin and soft-tissue lumps including lipomas, sebaceous cysts, ganglia and other benign growths. Assessed clinically and excised under local or general anaesthetic where indicated.
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General Surgery
GORD (reflux)
Gastro-oesophageal reflux disease causes heartburn, regurgitation and oesophageal damage. Managed with lifestyle, medication, or laparoscopic fundoplication for refractory cases.
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General Surgery
Diastasis recti
Separation of the rectus abdominis muscles, most commonly after pregnancy. Assessed clinically; surgical repair is considered when symptoms persist despite physiotherapy.
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Most patients are seen within 1–2 weeks. Mr Nguyen welcomes new referrals — a GP referral is required.

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General information only — not medical advice. Always consult a qualified healthcare practitioner. Last reviewed · May 2026
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