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Dr Rowan Collinson - General & Colorectal Surgeon

Private Service, General Surgery

Today

8:00 AM to 5:00 PM.

Description

Dr Rowan Collinson is a locally-trained Colorectal and General Surgeon. He is a Consultant at Auckland City Hospital, and in private practice at the MacMurray Centre, a multidisciplinary Gastrointestinal disorders clinic in Auckland. He undertook post-Fellowship training in Colorectal surgery in Sydney, Australia and Oxford, UK. He is a laparoscopic surgeon and colonoscopist who specialises in colorectal cancer, inflammatory bowel disease and pelvic floor disorders.

Rowan has a particular interest in colorectal disorders of the pelvic floor, including faecal incontinence and pelvic organ prolapse. This includes comprehensive assessment with anorectal physiology and endoanal ultrasound. Treatment is under-pinned by a multidisciplinary approach, and minimally invasive surgical techniques.
 
He is immediate Past-President of the Colorectal Surgical Society of Australia and New Zealand (CSSANZ), and a member of the Association of Coloproctology of Great Britain and Ireland (ACPGBI).
 
What is Colorectal Surgery? 
 
The colon and the rectum are part of the digestive tract that processes the food we eat. Together they make up the large intestine or large bowel and are located in the abdomen between the small intestine and the anus. The colon is about 1.8m long and absorbs water and nutrients from food. The rectum is the last segment of the large intestine and is about 20 -25cm long. This is where waste material is stored before it passes out of the body through the anus.
A colorectal surgeon is a general surgeon who has had further training and specialises in the diagnosis and treatment of diseases of the colon, rectum, and anus.
 
What is General Surgery?
 
The role of the general surgeon varies, but in broad terms general surgery can be said to deal with a wide range of conditions within the abdomen, breast, neck, skin and sometimes, vascular (blood vessel) system. 
While the name would suggest that the focus of general surgery is to perform operations, often this is not the case. Many patients are referred to surgeons with conditions that do not need surgical procedures, but merely require counselling or medical treatment.
 

Consultants

Referral Expectations

When you come to your appointment, your surgeon will ask questions about your illness and examine you to try to determine or confirm the diagnosis. This process may also require a number of tests (e.g. blood tests, x-rays, scans etc). Sometimes this can all be done during one visit, but for some conditions this will take several follow-up appointments. Occasionally some tests are arranged even before your appointment to try to speed up the process.
 
Once a diagnosis has been made, your surgeon will discuss treatment with you. In some instances this will mean surgery, while other cases can be managed with medication and advice. If surgery is advised, the steps involved in the surgical process and the likely outcome are usually discussed with you at this time.

Fees and Charges Description

Dr Rowan Collinson is a Southern Cross Affiliated Provider for Gastroenterology (Digestive system) services. These include :

  • Colonoscopy
  • Consultations
  • Flexible sigmoidoscopy
  • Physician/surgeon assessment and follow up
  • Proctoscopy
  • Sigmoidoscopy

Hours

8:00 AM to 5:00 PM.

Mon – Fri 8:00 AM – 5:00 PM

Procedures / Treatments

Colorectal Cancer

This is cancer that begins in your colon or rectum. Often, it may start as a polyp which is a growth of abnormal tissue on the lining of the colon or rectum. Most people will not have symptoms of colorectal cancer until the disease is at a fairly advanced stage. Then they may experience symptoms such as: change in bowel habit that lasts for more than a few days blood in the stool stomach pain. Tests used to confirm a diagnosis of colorectal cancer include: stool blood test – a sample of stool is tested for traces of blood sigmoidoscopy colonoscopy barium enema – a chalky white substance (barium) and air are pumped into the colon and x-rays are taken biopsy – a small piece of tissue is removed for examination under a microscope. Stool blood tests, sigmoidoscopy, colonoscopy and barium enemas are also used as screening tests to look for colorectal cancer in people without symptoms. If these tests find cancers at an early stage, the chances of successful treatment are much higher than when the cancers are further advanced. Screening tests can also involve the removal of polyps that may become cancerous in the future. Treatment The choice of treatment depends on your overall health as well as how far advanced the cancer is. This is determined in a process known as ‘staging’ in which the tumour size, lymph node involvement and spread to other organs is assessed. The three main forms of treatment for colorectal cancer are: Surgery – the most common treatment. Surgery may involve ‘Open Surgery’ in which a large incision (cut) is made in your abdomen or ‘Laparoscopic Surgery’ in which several much smaller incisions are made. The section of the colon or rectum with the cancer is removed and the two ends are reconnected. In some cases, a temporary or permanent colostomy may be required to remove body wastes. Chemotherapy – anticancer medicines, either taken by mouth (oral) or injected into a vein (intravenous), can destroy cancer cells and slow tumour growth. Chemotherapy is useful to treat cancers that have spread to other parts of the body and may also be used before or after surgery or in combination with radiation therapy. Radiation Therapy – high energy x-rays are used to destroy cancer cells or shrink tumours. It is often used together with surgery, in some cases to shrink the tumour before surgery, or to destroy any cells that may be left behind after surgery.

This is cancer that begins in your colon or rectum. Often, it may start as a polyp which is a growth of abnormal tissue on the lining of the colon or rectum.

Most people will not have symptoms of colorectal cancer until the disease is at a fairly advanced stage. Then they may experience symptoms such as:

  • change in bowel habit that lasts for more than a few days
  • blood in the stool
  • stomach pain.

Tests used to confirm a diagnosis of colorectal cancer include:

  • stool blood test – a sample of stool is tested for traces of blood
  • sigmoidoscopy
  • colonoscopy
  • barium enema – a chalky white substance (barium) and air are pumped into the colon and x-rays are taken
  • biopsy – a small piece of tissue is removed for examination under a microscope.

Stool blood tests, sigmoidoscopy, colonoscopy and barium enemas are also used as screening tests to look for colorectal cancer in people without symptoms. If these tests find cancers at an early stage, the chances of successful treatment are much higher than when the cancers are further advanced. Screening tests can also involve the removal of polyps that may become cancerous in the future.

Treatment

The choice of treatment depends on your overall health as well as how far advanced the cancer is. This is determined in a process known as ‘staging’ in which the tumour size, lymph node involvement and spread to other organs is assessed.

The three main forms of treatment for colorectal cancer are:

Surgery – the most common treatment. Surgery may involve ‘Open Surgery’ in which a large incision (cut) is made in your abdomen or ‘Laparoscopic Surgery’ in which several much smaller incisions are made. The section of the colon or rectum with the cancer is removed and the two ends are reconnected. In some cases, a temporary or permanent colostomy may be required to remove body wastes.

Chemotherapy – anticancer medicines, either taken by mouth (oral) or injected into a vein (intravenous), can destroy cancer cells and slow tumour growth. Chemotherapy is useful to treat cancers that have spread to other parts of the body and may also be used before or after surgery or in combination with radiation therapy.

Radiation Therapy – high energy x-rays are used to destroy cancer cells or shrink tumours. It is often used together with surgery, in some cases to shrink the tumour before surgery, or to destroy any cells that may be left behind after surgery.

Inflammatory Bowel Disease (IBD)

There are two types of IBD, ulcerative colitis and Crohn’s disease. In these conditions, the immune system attacks the lining of the colon causing inflammation and ulceration, bleeding and diarrhoea. In ulcerative colitis this only involves the large intestine, whereas in Crohn’s disease areas within the entire intestine can be involved. Both diseases are chronic (long term) with symptoms coming (relapse) and going (remission) over a number of years. Symptoms depend on what part of the intestine is involved but include: o abdominal pain o diarrhoea with bleeding o tiredness o fevers o infections around the anus (bottom) o weight loss can occur if the condition has been present for some time. Diagnosis is made when the symptoms, examination and blood tests suggest inflammatory bowel disease, infection is ruled out, and you undergo a colonoscopy with biopsy. Treatment depends on the severity of the symptoms and what part of the intestine is affected. Medication is aimed at suppressing the immune system, which is harming the lining of the bowel. This is done via oral or intravenous medication as well as medication given as an enema (via the bottom). Other treatments include changes in the diet to optimise nutrition and health. Treatment in some cases requires surgery to remove affected parts of the bowel. For more information see www.crohnsandcolitis.org.nz

There are two types of IBD, ulcerative colitis and Crohn’s disease.  In these conditions, the immune system attacks the lining of the colon causing inflammation and ulceration, bleeding and diarrhoea.  In ulcerative colitis this only involves the large intestine, whereas in Crohn’s disease areas within the entire intestine can be involved.  Both diseases are chronic (long term) with symptoms coming (relapse) and going (remission) over a number of years.

Symptoms depend on what part of the intestine is involved but include:                         

o      abdominal pain

o      diarrhoea with bleeding

o      tiredness

o      fevers

o      infections around the anus (bottom) 

o      weight loss can occur if the condition has been present for some time.

Diagnosis is made when the symptoms, examination and blood tests suggest inflammatory bowel disease, infection is ruled out, and you undergo a colonoscopy with biopsy.

Treatment depends on the severity of the symptoms and what part of the intestine is affected.  Medication is aimed at suppressing the immune system, which is harming the lining of the bowel.  This is done via oral or intravenous medication as well as medication given as an enema (via the bottom).  Other treatments include changes in the diet to optimise nutrition and health.  Treatment in some cases requires surgery to remove affected parts of the bowel.  For more information see www.crohnsandcolitis.org.nz

Gastrointestinal Disorders

Conditions of the gut dealt with by general surgery include disorders of the oesophagus, stomach, small bowel, large bowel and anus. These range from complex conditions such as ulceration or cancer in the bowel through to fairly minor conditions such as haemorrhoids. Many of the more major conditions such as bowel cancer will require surgery, or sometimes treatment with medication, chemotherapy or radiotherapy. Haemorrhoids are a condition where the veins under the lining of the anus are congested and enlarged. Less severe haemorrhoids can be managed with simple treatments such as injection or banding which can be performed in the clinic while larger ones will require surgery.

Conditions of the gut dealt with by general surgery include disorders of the oesophagus, stomach, small bowel, large bowel and anus. These range from complex conditions such as ulceration or cancer in the bowel through to fairly minor conditions such as haemorrhoids. Many of the more major conditions such as bowel cancer will require surgery, or sometimes treatment with medication, chemotherapy or radiotherapy.

Haemorrhoids are a condition where the veins under the lining of the anus are congested and enlarged. Less severe haemorrhoids can be managed with simple treatments such as injection or banding which can be performed in the clinic while larger ones will require surgery.
Haemorrhoids

Haemorrhoids are a condition where the veins under the lining of the anus are congested and enlarged. Less severe haemorrhoids can be managed with simple treatments such as injection or banding which can be performed in the clinic while larger ones will require surgery. Haemorrhoid Removal Haemorrhoidectomy: each haemorrhoid or pile is tied off and then cut away. Stapled Haemorrhoidectomy: a circular stapling device is used to pull the haemorrhoid tissue back into its normal position.

Haemorrhoids are a condition where the veins under the lining of the anus are congested and enlarged. Less severe haemorrhoids can be managed with simple treatments such as injection or banding which can be performed in the clinic while larger ones will require surgery.

Haemorrhoid Removal

Haemorrhoidectomy: each haemorrhoid or pile is tied off and then cut away.

Stapled Haemorrhoidectomy: a circular stapling device is used to pull the haemorrhoid tissue back into its normal position.

Colonoscopy

Colonoscopy is the examination of your colon (large bowel) using a colonoscope (long, flexible tube with a camera on the end). The colonoscope is passed into your rectum (bottom) and then moved slowly along the entire colon, while images from the camera are displayed on a television monitor. The procedure takes from 10 minutes to an hour. Sometimes a small tissue sample (biopsy) will need to be taken during the procedure for later examination at a laboratory. A colonoscopy may help diagnose conditions such as polyps (small growths of tissue projecting into the bowel), tumours, ulcerative colitis (inflammation of the colon) and diverticulitis (inflammation of sacs that form on the walls of the colon). Colonoscopy may also be used to remove polyps in the colon. Risks of a colonoscopy are rare but include: bleeding if a biopsy is performed; allergic reaction to the sedative; perforation (tearing) of the bowel wall. What to expect It is important that the bowel is completely empty before the procedure takes place. This means that you will only be able to have liquids on the day before, and will probably have to take some oral laxative medication (to make you go to the toilet more). When you are ready for the procedure, you will be given medication (a sedative) to make you go into a light sleep. This will be given by an injection into a vein in your arm or hand. The colonoscopy will usually take 15 – 30 minutes, but you will probably sleep for another 30 minutes. Because you have been sedated (given medication to make you sleep) it is important that you arrange for someone else to drive you home. Some patients may experience discomfort after the procedure, due to air remaining in the colon.

Colonoscopy is the examination of your colon (large bowel) using a colonoscope (long, flexible tube with a camera on the end). The colonoscope is passed into your rectum (bottom) and then moved slowly along the entire colon, while images from the camera are displayed on a television monitor. The procedure takes from 10 minutes to an hour. Sometimes a small tissue sample (biopsy) will need to be taken during the procedure for later examination at a laboratory.

A colonoscopy may help diagnose conditions such as polyps (small growths of tissue projecting into the bowel), tumours, ulcerative colitis (inflammation of the colon) and diverticulitis (inflammation of sacs that form on the walls of the colon).

Colonoscopy may also be used to remove polyps in the colon.

Risks of a colonoscopy are rare but include: bleeding if a biopsy is performed; allergic reaction to the sedative; perforation (tearing) of the bowel wall.

What to expect

It is important that the bowel is completely empty before the procedure takes place. This means that you will only be able to have liquids on the day before, and will probably have to take some oral laxative medication (to make you go to the toilet more).

When you are ready for the procedure, you will be given medication (a sedative) to make you go into a light sleep. This will be given by an injection into a vein in your arm or hand.

The colonoscopy will usually take 15 – 30 minutes, but you will probably sleep for another 30 minutes. Because you have been sedated (given medication to make you sleep) it is important that you arrange for someone else to drive you home.

Some patients may experience discomfort after the procedure, due to air remaining in the colon.

Hernias

A hernia exists where part of the abdominal wall is weakened, and the contents of the abdomen push through to the outside. This is most commonly seen in the groin area but can occur in other places. Surgical treatment is usually quite straightforward and involves returning the abdominal contents to the inside and then reinforcing the abdominal wall in some way.

A hernia exists where part of the abdominal wall is weakened, and the contents of the abdomen push through to the outside. This is most commonly seen in the groin area but can occur in other places. Surgical treatment is usually quite straightforward and involves returning the abdominal contents to the inside and then reinforcing the abdominal wall in some way.

Gallstones

General surgery covers some disorders of the liver and biliary system. The most common of these is pain caused by gallstones. These are formed if the gallbladder is not working properly, and the standard treatment is to remove the gallbladder (cholecystectomy). This procedure is usually performed using a laparoscopic (keyhole) approach.

General surgery covers some disorders of the liver and biliary system. The most common of these is pain caused by gallstones. These are formed if the gallbladder is not working properly, and the standard treatment is to remove the gallbladder (cholecystectomy). This procedure is usually performed using a laparoscopic (keyhole) approach.

Rectal Prolapse
Colorectal Pelvic Floor Disorders

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Contact Details

8:00 AM to 5:00 PM.

3 MacMurray Road
Remuera
Auckland 1050

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Street Address

3 MacMurray Road
Remuera
Auckland 1050

This page was last updated at 4:19PM on November 22, 2023. This information is reviewed and edited by Dr Rowan Collinson - General & Colorectal Surgeon.