Mr Chris Wakeman. General Surgeon University of Otago, Christchurch. 12:15-12:40 Management of Colorectal Cancer
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1 Mr Chris Wakeman General Surgeon University of Otago, Christchurch 12:15-12:40 Management of Colorectal Cancer
2 Bowel cancer Chris Wakeman Colorectal Surgeon Christchurch
3 Sam Simon (Simpsons) Elizabeth Montgomery (bewitched) Audrey Hepburn Queen Elizabeth The Queen Mother Bobby Moore Malcolm Marshall Robin Gibb Vince Lombardi Charles M. Schulz Harold Wilson
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5 Age-Standardized Colorectal Cancer Incidence Rates by Sex and World Area. Global Cancer Statistics A CANCER J CLIN 2011;61:69 90
6 Bowel cancer kills as many Kiwi lives every year as breast and prostate cancer combined
7 The 10 most common cancers in females, 2012 Source: New Zealand Cancer Registry
8 The 10 most common cancers in males, 2012 Source: New Zealand Cancer Registry
9 What is the Average Risk for individuals in NZ? 55 yrs: Overall risk 0.6% 75 yrs Overall risk 5.6% Men: 1 in 18 Women 1 in 23
10 What happening with the incidence <50 Incidence increasing supports hypothesis ( , ) p = Incidence decreasing (-3.520, ) p < Incidence increasing (1.431, 5.252) p =
11 Five times as many Kiwis die as a result of Bowel Cancer than road traffic accidents
12 Colorectal Cancer Symptoms Change in bowel habit closer to the anus the more symptoms change in frequency or consistency of stool Rectal bleeding overt or occult bright red, purple, black, not apparent occult-anaemia Mucus Pain; rectal or abdominal Uncommon Implies obstruction or growth into other organs Back pain-retroperitoneal extension Weight loss/fatigue Symptoms of metastatic disease lung, brain, liver
13 What determines outcome Stage of disease Presentation Quality of surgery Adjunctive therapy It is the cumulative effect of small gains that lead to improvement
14 Cum. Survival Cum. Survival Colon Cancer 1 Kaplan-Meier Cum. Survival Plot for Surv Censor Variable: Dead Grouping Variable: Cohort Split By: R/C Cell: C 1 stage 1 and 2 STAGE 3 Kaplan-Meier Cum. Survival Plot for Surv Censor Variable: Dead Grouping Variable: Cohort Split By: R/C Cell: C Cum. Survival (1) Cum. Survival (2) Cum. Survival (3) Cum. Survival (4).6.4 Cum. Surviv Cum. Surviv Cum. Surviv Cum. Surviv Time Time
15 Cum. Survival Cum. Survival RECTAL CANCER STAGE 1 AND 2 STAGE 3 Kaplan-Meier Cum. Survival Plot for Surv Censor Variable: Dead Grouping Variable: Cohort Split By: R/C Cell: R Kaplan-Meier Cum. Survival Plot for Surv Censor Variable: Dead Grouping Variable: Cohort Split By: R/C Cell: R Cum. Survival (1) Cum. Survival (2) Cum. Survival (3) Cum. Survival (4).6.4 Cum. Survival (1) Cum. Survival (2) Cum. Survival (3) Cum. Survival (4) Time Time
16 Cum. Survival STAGE 4 (both colon and rectum) 1 Kaplan-Meier Cum. Survival Plot for Surv Censor Variable: Dead Grouping Variable: Cohort Cum. Survival (1) Cum. Survival (2) Cum. Survival (3) Cum. Survival (4) Time
17 Cum. Survival Cum. Survival 1 TYPE OF SURGEON Colon Kaplan-Meier Cum. Survival Plot for Surv Censor Variable: Dead Grouping Variable: Surg 2 1 Rectum Kaplan-Meier Cum. Survival Plot for Surv Censor Variable: Dead Grouping Variable: Surg 2 Split By: R/C Cell: R Cum. Survival (1) Cum. Survival (2) Cum. Survival (3).6 Cum. Survival (1 Cum. Survival (2.4.4 Cum. Survival ( Time Time
18 Colorectal Cancer Am J Med genetics Vol 129C Aug 15th 2004
19 Hereditary Non Polyposis Colorectal Cancer HNPCC First described by Dr Scott Warthin Published family pedigree that meets HNPCC criteria in 1913 His seamstress predicted her death from gynaecological or CRC. and was correct Henry Lynch followed up on this and other Nebraskan families in 1960 s Condition termed HNPCC - to distinguish it from FAP with multiple polyps
20 Lynch Syndrome - Genetics Autosomal dominant familial cancer syndrome 50:50 chance of passing it on Caused by germline mutation in DNA mismatch repair (MMR) genes Tumours have microsatellite instability (MSI) Loss of protein expression of the 4 genes can be shown with IHC (immunohistochemistry) MLH1 and MSH % - classic form MSH6-5-10% attenuated later onset PMS2 2-5% - attenuated - reduced penetrance
21 Families previously called HNPCC now divided up Lynch Syndrome families where a mutation has been found in the family by genetic testing Families where criteria are met and special tests suggest the involvement of the MMR genes but genetic testing has not found a mutation- Presumed Lynch Syndrome. Families where Amsterdam criteria are met and special tests DO NOT suggest the involvement of the MMR genes Familial Colorectal Cancer Syndrome X Those who meet criteria but no testing possible- currently still HNPCC
22 Lynch Syndrome : management Colorectal Cancer Intensive colonoscopic surveillance 1-2 yrly from 25 years. 43% reduction in incidence of CRC Significant decrease in mortality from CRC (detected at earlier stage) Surgery for treatment of CRC Segmental or subtotal colectomy Balance of metachronous CRC risk with quality of life Surveillance for extra-colonic tumours Urinary Tract tumours value unknown Urine cytology may be undertaken 1-2yearly from 35yrs Endometrial Cancer value unknown Annual surveillance by examination, transvaginal ultrasound and aspiration biopsy from age 35yrs may be beneficial Hysterectomy may be an option
23 Aspirin and bowel cancer in Lynch Syndrome Long-term effect of aspirin on cancer risk in carriers of hereditary colorectal cancer: an analysis from the CAPP2 randomised controlled trial 600 mg aspirin per day for a mean of 25 months substantially reduced cancer incidence after 55.7 months in carriers of hereditary colorectal cancer. Further studies are needed to establish the optimum dose and duration of aspirin treatment. Burn et al Lancet ;378 December 2011
24 FAP Inheritance APC gene on Chromosome 5 20 % have no family history In 10% cases unable to identify APC gene mutation Penetrance is virtually 100% Onset of polyposis is in teenage years. Most patients are asymptomatic Age of onset for colorectal cancer is late 30 s - early 40 s
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28 Something must cause bowel cancer or is it just random event
29 Adenoma to Carcinoma Pathway Normal Adenoma Cancer Most cancers develop from adenomatous polyps
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32 We think that sporadic CRC is caused by a chronic low grade infection
33 Bacteria causing gastric cancer; H Pylori
34 Environment has some effect Migrant studies Migrants adapt to country of residence Japan to USA Polish to Australia Chinese to Australia Maintaining the cuisine if country of origin reduces this effect
35 Some risks you can reduce Diet Exercise Weight Smoking Alcohol
36 Can we find CRC sooner Screening
37 Screen or not to screen Wait for patients to get symptoms or screen At present screen for Breast Cancer Cervical Cancer Screening as about as effective for CRC as it is for these
38 Colorectal cancer screening For screening to work Precursor lesion Tool to find this Low morbidity Cost effective
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40 Bowel Screening Pilot results Round 1-121,798 people were invited to take part and 69,176 people returned a correctly completed kit. The New Zealand participation rate for Round 1 of 56.8 percent was higher than the internationally acceptable minimum participation rate of 45.0 percent for first screening rounds. Round 2-115,776 people were invited and 61,771 people returned a correctly completed kit.
41 Bowel Screening Pilot results 7800 patients had colonoscopies 316 patients were found to have a CRC (some more than one) 30+ other lesions found that need operation Many polyps removed (65%+)
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43 What is new? A "watch-and-wait" approach in the treatment of rectal cancer has again been shown to be as oncologically safe as radical surgery among patients who achieve a clinical complete response to chemoradiotherapy. It also allows many patients to avoid a permanent colostomy, conclude researchers reporting on the Oncological Outcomes after Clinical Complete Response in Patients With Rectal Cancer (OnCoRe) project. The study was published online December 16 in the Lancet Oncology.
44 Laparoscopic rectal cancer The "revolutionary change" brought about by laparoscopic surgery for gastrointestinal tract cancers might stop at the rectum, according to two major randomized clinical trials that compared the minimally invasive surgery with traditional open resection. The studies were published in the October 6 issue of JAMA. Both trials the ACOSOG Z6051 trial conducted in North America and the ALaCaRT trial conducted in Oceania failed to establish the noninferiority of laparoscopic rectal cancer surgery.
45 Trans anal TME
46 Whats new Robotic surgery
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48 3 rd MOST Diagnosed cancer in New Zealand. 3,300 People are diagnosed with bowel cancer every year in New Zealand. 1,300 New Zealanders die each year as a result of Bowel Cancer.
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