David P. Ryan, M.D. Clinical Director, MGH Cancer Center Chief, Hematology-Oncology, MGH
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1 Colon Cancer 2015 David P. Ryan, M.D. Clinical Director, MGH Cancer Center Chief, Hematology-Oncology, MGH
2 Colon Cancer Case presentation 72yo woman presented 1/03 abd discomfort and nausea Found to have Hct 30 MCV 71 Alk Ph 150 USG of pelvis to f/u fibroids demonstrated liver mass Colonoscopy: splenic flexure mass = adenocarcinoma
3 Agenda Statistics and Epidemiology Inherited Syndromes Approach to Screening Treatment
4 Statistics
5 Statistics
6 Cancer Trends
7 7 Probability of Developing Cancer
8 5 Leading Cancer Deaths
9 Colon Cancer Epidemiologic Associations Western/urbanized societies High meat High saturated fat and cholesterol Increased bowel anaerobic flora Deconjugated fecal bile acid excretion Diabetes Mellitus Tobacco use Obesity Alcohol
10 Colon Cancer Epidemiologic Associations Western/urbanized societies High meat High saturated fat and cholesterol Increased bowel anaerobic flora Deconjugated fecal bile acid excretion Diabetes Mellitus Tobacco use Obesity Alcohol
11 11 Obesity and Cancer in Men
12 12 Obesity and Cancer in Women
13 Colon Cancer Epidemiologic Associations IBD Risk in UC correlates with extent, duration and severity of disease Risk of cancer in UC 9% at 10 yrs, 20% at 20yrs, and >35% at 30 years Total colectomy eliminates the risk Cholecystectomy Ureterocolic anastamoses Pelvic Radiation Low Vit D
14 Colon Cancer Protective Factors NSAIDs, folate, calcium, estrogens prevent development of polyps No clear benefit for prevention of cancer What is the role in patients getting adequately screened? Physical activity Diets high in fish and low in red meat associated with reduced incidence of colorectal cancer Out of favor: anti-oxidants and fiber
15 Colon Cancer Chemoprevention with Aspirin Multiple retrospective studies: reduced risk of colorectal adenomas and cancer in regular aspirin users The Nurses' Health Study: regular use of aspirin ( 2 standard aspirin tables per day) was associated with a 25 percent reduction in the risk of an adenoma (RR 0.75, 95 percent CI 0.66 to 0.84) Randomized studies of aspirin after a diagnosis of colorectal adenoma/carcinoma demonstrate reduced rate of adenomas
16 Colon Cancer Chemoprevention with Aspirin BUT, the Physician s Health Study (prospective) failed to demonstrate a significant effect of aspirin use on the incidence of colorectal cancer SUMMARY: The overall risk/benefit of prolonged daily aspirin for the primary prevention of colorectal cancer is unknown
17 But
18 Colon Cancer Polyps: hamartoma, hyperplastic, adenoma Adenomas are pre-malignant Occur in 30-50% of adults <1% polyps become cancer Adenomatous polyps more likely to become cancer if sessile, villous, and > 1.5cm Takes at least 5 yrs for polyp to become cancer Some hyperplastic polyps may be pre-malignant Serrated polyps associated with right sided colon cancers that are braf mutant
19 Colon Cancer: Vogelgram
20 Carcinogenesis
21 Causes of colorectal cancer Sporadic (65% 85%) Familial (10% 30%) Rare CRC syndromes (<0.1%) Familial adenomatous polyposis (FAP) (1%) Hereditary nonpolyposis colorectal cancer (HNPCC) (5%) Adapted from Burt RW et al. Prevention and Early Detection of CRC, 1996
22 Familial Risk for Colorectal Cancer Approximate lifetime CRC risk (%) % None One 1 Aarnio M et al. Int J Cancer 64:430, 1995 Houlston RS et al. Br Med J 301:366, 1990 St John DJ et al. Ann Intern Med 118:785, % 8% 10% One 1 and two 2 One 1 <45 yo 17% Two 1 Affected family members 70% HNPCC mutation
23 Colon Cancer Epidemiology Inherited Syndromes Hereditary Non-Polyposis Colon Cancer Familial Adenomatous Polyposis MYH
24 Colon Cancer Epidemiology Hereditary Non-Polyposis Colon Cancer (Lynch Syndrome) Autosomal dominant Germline mutations in Mismatch Repair (MMR) genes leads to Microsatellite Instability (MSI) Median age for tumors < 50 Proximal colon >> distal colon May account for 5% of colon cancers
25 Cancer Risks in HNPCC 100 % with cancer Colorectal 78% Aarnio M et al. Int J Cancer 64:430, 1995 Age (years) Endometrial 43% Stomach 19% Biliary tract 18% Urinary tract 10% Ovarian 9%
26 HNPCC Diagnosis Amsterdam criteria Bethesda criteria
27 Amsterdam Criteria Failure to meet these criteria does not exclude HNPCC
28 HNPCC: Bethesda Criteria
29 Laboratory Testing for HNPCC Tests on the Tumor Immunohistochemistry testing of the tumor MSI testing Tests on the Blood Sequence analysis
30 Surveillance Options for Carriers of HNPCC- Associated Mutations Malignancy Colorectal cancer Endometrial cancer Intervention Colonoscopy l l Transvaginal ultrasound Endometrial aspirate Recommendation Begin at age 20 25, repeat every 1 2 years Annually, starting at age 25 35
31 Other Surveillance in HNPCC Annual EGD Annual urinalysis with cytology Annual abdominal ultrasound
32 Clinical Features of FAP Estimated penetrance for adenomas >90% Untreated polyposis leads to 100% risk of cancer
33 Colon Cancer Epidemiology Familial Adenomatous Polyposis Associated with Congenital hypertophy of the retinal pigment epithelium Desmoid tumors (Gardner s Syndrome) Brain tumors (Turcot s Syndrome) Screening of first degree relatives by age 10 Thousands of adenomatous polyps develop by age 20 and lead to cancer Total colectomy with ileoanal anastomosis is treatment of choice
34 Lifetime Risk of Extra-Colonic Cancer in FAP Site Type of Cancer Risk of Cancer Small bowel: duodenum or periampulla Small bowel: distal to the duodenum Carcinoma 4-12% Rare Stomach Adenocarcinoma 0.5% Pancreas ~2% Thyroid CNS Liver Bile ducts Adrenal gland Papillary thyroid carcinoma Usually medulloblastoma Hepatoblastoma Adenocarcinoma ~2% <1% 1.6% (children <age 5 years) Low, but increased
35 Many adenomas but no germline mutation in APC Consider germline mutations in MYH: Base-excision repair gene. Bi-allelic germline mutations predispose to APC mutations that lead to colon adenomas, tumors. Family history of colon cancer shows recessive inheritance. Tens-to-hundreds of colorectal adenomas.
36 MGH Center for Cancer Risk Analysis Genetic Counselors: Programs:»6 counselors Breast and Ovarian: Leif Ellisen, MD, PhD Gastrointestinal: Daniel Chung, MD; Andy Chan, MD; Von Hippel Lindau: Othon Iliopoulos, MD Melanoma: Hensin Tsao, MD, PhD Psychiatry: William Pirl, MD
37 Colorectal Cancer Screening How should I approach it?
38 US MultiSociety Task Force 2008 CA A Cancer J for Clin 2008; 58:
39 39 US Multisociety Task Force, 2012 Update
40 Colon Cancer Screening Hemoccult: gfobt or FIT 2-4% of adults with test positive and 60% will have no mucosal abnormality in their large bowel 50% of pts with CRC will have a false negative study Minnesota study demonstrated that screening reduces deaths from CRC BUT 36% of pts assigned to annual screening underwent endoscopy and there were 20% less cancers in this subgroup
41 Colon Cancer Screening sdna Sensitivity 52-91% Specificity 93-97%?interval?need for endoscopy
42 FIT vs sdna Imperiale TF et al. N Engl J Med 2014;370: Imperiale T et al. N Engl J Med 2004;351:
43 Colon Cancer Screening Barium Enema DON T DO IT
44 Colon Cancer Screening Endoscopy Flexible sigmoidoscopy vs Colonscopy Approximately 2% of asymptomatic adults will have proximal precancerous or cancerous lesions and have TOTALLY NORMAL sigmoidoscopies Fecal occult blood testing plus sigmoidoscopy has a sensitivity of 75%, ie will miss 25% of lesions Colonoscopy may miss lesions as much as 4% of time
45 Colonoscopy vs Flex Sig Source Lieberman NEJM 2000 Imperiale NEJM 2000 % % pts adequate advanced exam neoplasm* *advanced neoplasm=carcinoma, dysplasia, or villous adenoma
46 Colonoscopy vs Flex Sig % pts with proximal neoplasm if distal bowel showed Source Advanced neoplasm Tubular adenoma No polyp Lieberman NEJM 2000 Imperiale NEJM
47 Colonoscopy and CRC Death Baxter, N. N. et. al. Ann Intern Med 2009;150:1-8
48 Colonoscopy and CRC Death Baxter, N. N. et. al. Ann Intern Med 2009;150:1-8
49 US Preventive Services Task Force March 2008 When to stop? U.S. Preventive Services Task Force, Ann Intern Med 2008;0: E-243
50 Colon Cancer Screening Average Risk Colonoscopy beginning at age 50 every 10 years If pathology found, follow the recommendation of the gastroenterologist For low risk adenoma, they will recommend repeat screening at 5 years For high risk adenoma, they will recommend repeat screening at 3 years
51 Colon Cancer Increased Risk Screening Made Easy Have you ever had colorectal cancer or an adenomatous polyp? Have you had inflammatory bowel disease (ulcerative colitis or Crohn's disease)? Has a family member had colorectal cancer or an adenomatous polyp? If so, how many, was it a first-degree relative (parent, sibling, or child), and at what age was the cancer or polyp first diagnosed?
52 Colon Cancer Screening Made Easy Have you ever had colorectal cancer or an adenomatous polyp? Colonoscopy q 3-5years Have you had inflammatory bowel disease (ulcerative colitis or Crohn's disease)? Has a family member had colorectal cancer or an adenomatous polyp? If so, how many, was it a first-degree relative (parent, sibling, or child), and at what age was the cancer or polyp first diagnosed?
53 Colon Cancer Screening Made Easy Have you ever had colorectal cancer or an adenomatous polyp? Colonoscopy q 3-5years Have you had inflammatory bowel disease (ulcerative colitis or Crohn's disease)? refer to Gastroenterology Has a family member had colorectal cancer or an adenomatous polyp? If so, how many, was it a first-degree relative (parent, sibling, or child), and at what age was the cancer or polyp first diagnosed?
54 Colon Cancer Screening Made Easy Has a family member had colorectal cancer or an adenomatous polyp? If so, how many, was it a first-degree relative (parent, sibling, or child), and at what age was the cancer or polyp first diagnosed? Begin screening at least 10 years younger than the youngest member in the family with colon cancer Begin screening at age 40 if first degree relative had colon cancer <60 Refer to High Risk Genetics if HNPCC suspected
55 Colon Cancer: Screening CT Colonography Appears to be just as good for lesions that are 1cm in size Very good for patients who have incomplete colonoscopies Still have to give GI prep Novel preps under investigation Not able to biopsy
56 Colon Cancer Clinical Presentation Nearly half of colon cancers are found in the right side of the colon Trend is for unknown reasons Different biology (e.g. braf mutation) Presenting symptoms (ie bleeding, change in bowel habits, anemia, obstuction) depend on location Clinical pearls
57 Colon Cancer Clinical Presentation Clinical pearls If you feel something on rectal exam, never assume that it is an internal hemorrhoid
58 Colon Cancer Clinical Presentation Clinical pearls If you feel something on rectal exam, never assume that it is an internal hemorrhoid A walled off perforation from a colon cancer can masquerade as diverticulitis
59 Colon Cancer Clinical Presentation Clinical pearls If you feel something on rectal exam, never assume that it is an internal hemorrhoid A walled off perforation from a colon cancer can masquerade as diverticulitis If an Fe def anemia workup has been done and nothing found, repeat the colonoscopy right sided lesions could have been missed
60 Staging of Colorectal Cancer Stage Extent of tumor 5-year survival I (T1) No deeper than submucosa >90% I (T2) Not through bowel wall >90% II Through bowel wall 80% IIIa Not through bowel wall: lymph node metastases 70-90% IIIb/c Through bowel wall: lymph node metastases 40-80% IV Distant metastases 20% Lung Mucosa Muscularis mucosa Submucosa Liver Lung Bone Skin Brain Muscularis propria Serosa Fat Lymph nodes Adapted from Skarin AT, ed. Atlas of Diagnostic Oncology. 3rd ed. St. Louis, Mo: Mosby Inc; 2003:155.
61 Colon Cancer Treatment Stage I: surgery Laparoscopic or open colectomy Stage II: surgery +?chemotherapy Stage III: surgery + chemotherapy Stage IV: chemotherapy +?surgery Patients with isolated liver or lung metastases can be cured with surgical resection
62 Rectal Cancer: Total Mesorectal Excision
63 Rectal Cancer Treatment Stage I: surgery Stage II: surgery + chemotherapy + radiation Stage III: surgery + chemotherapy + radiation Stage IV: chemotherapy +?surgery
64 Colorectal Cancer Surveillance Colonoscopy 1 year after diagnosis and then every 3-5 years For stage 2 and 3, every 3 month CEA/LFTs/physical exam and annual CT for 3 years. Then follow annually with cea and LFTs until year 5 Lifestyle/Dietary Changes: Very good retrospective or observational evidence Exercise, ASA, Vit D?Red meat
65 Colorectal Cancer: Chemotherapy for Metastatic Disease or By little and little 3 reasons for seeing an oncologist Be Cured Live Longer Feel Better
66 How to Explain to Patients Stage 3c
67 How to Explain to Patients Stage 3c
68 How to Explain to Patients Stage 3c
69 How to Explain to Patients Stage 3a
70 How to Explain to Patients Stage 3a
71 Advances in the Treatment of Colorectal Cancer FU Irinotecan Capecitabine Oxaliplatin Cetuximab Bevacizumab Panitumumab Regorafenib TAS 102 Adjuvant chemotherapy Neoadjuvant chemotherapy
72 Stage 4 Colon Cancer: Improved Survival Kopetz et al JCO 2012
73 Overall Survival for Liver Resection Adam R, et al., Ann Surgery Oct;240(4):
74 CALGB/SWOG 80405: Overall Survival FOLFOX Treated Arm N (Events) OS (m) Median 95% CI FOLFOX + Cetux 426 (277) FOLFOX + Bev 409 (290) P=0.09 HR 0.9 ( )
75 75
76 76
77 Colon Cancer Case presentation Left hemicolectomy for T4, N1, M1 colon cancer Treated with chemotherapy
78 Colon Cancer Case presentation
79 Colorectal Cancer Summary Obesity and Exercise Colonoscopy: Left >>Right Identification of high risk patients is key in offering appropriate screening All stage III and some stage II patients will get 6 months of adjuvant therapy Treatment of metastatic disease has changed dramatically in last 10 years
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