ONCOLOGY FOR THE INTERNIST CANCER SCREENING Devapiran Jaishankar Associate Professor ETSU.
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Transcript of ONCOLOGY FOR THE INTERNIST CANCER SCREENING Devapiran Jaishankar Associate Professor ETSU.
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ONCOLOGY FOR THE INTERNISTCANCER SCREENING
Devapiran JaishankarAssociate Professor
ETSU
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Disclosures
• No disclosures
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Questions? Questions? Questions?
• Is there a guideline ?
• What is the guideline ?
• Has there been a change ?
• Why ?
• How do I adopt it for the patient in front of me ?
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Cancers to Screen ?
• Cervical cancer
• Lung cancer
• Colon cancer
• Breast cancer
• Prostate cancer
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USPSTF Grades of Recommendation
Annals of Internal Medicine ; June 2012
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Levels of CertaintyHighConsistent results
ModerateSufficient evidence, confidence constrained, future recommendations may alter
LowInsufficient evidence not generalizable
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Why we screen for cervical cancer
• Annual incidence: 6.6 per 100,000 women
• 12,000 new cases in 2010 in the US
• 4200 deaths in 2010 in the US
• Dramatic decrease in mortality
• Most cases in the US related to inadequate screening
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Cervical cancerWho should we screen
• All women with a cervix regardless of sexual history
• Women aged 21-65
• The guidelines do not apply to the following patients
• 1. High grade precancerous lesion
• 2. Prior cervical cancer
• 3. In utero exposure to DES (diethylstilbestrol)
• 4. Immuno compromised status - HIV positive patients
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Cervical cancer screeningGuidelines Summary
Annals of Internal Medicine; June 2012
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Cervical cancer screening methodology
• Conventional cytology as good as liquid based cytology
• HPV testing slightly more sensitive but with higher false positives
• HPV testing positive more often in younger women ( age < 30-35 years)
• Cervical cancer common in older women (age 35-55)
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Cervical cancerPotential harms to screening - treatment
Surveillance vs Surveillance and Immediate colposcopy
•Pain: 15% vs 39%
•Bleeding: 17% vs 47%
•Discharge: 9% vs 34%
•Cervical conization or Loop electrosurgical excision– Pain: 67%
– Bleeding 83%
– Discharge 63%
– Adverse outcomes with future pregnancies (preterm delivery < 40 weeks, low birth weight and perinatal mortality)
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What is adequate cervical screening history in the elderly ?
• Current guidelines define adequate screening as– 3 consecutive negative cytology results or– 2 consecutive negative HPV tests– Within the ten year period before stopping cervical cancer screening– With the most recent test performed within the last 5 years
• Screening women who have never been screened reduces mortality by 74% ( even if age > 65 )
• 29% of all invasive cervical carcinoma in women never screened
• 50% of invasive cervical carcinoma in women never screened or not screened in the last 5 years
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Cervical cancer biology
• Invasive cervical carcinoma is almost universally linked to HPV infection
• HPV infection of the cervix is generally transient
• When this infection is not cleared by the immune system • And the HPV strain happens to be an oncogenic strain • Incorporation of the oncogenic HPV genome into the host
• Development of precancerous lesions: CIN • Invasive cervical carcinoma
• Long preclinical phase: Infection Pre cancer Invasive cancer
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Lung Cancer Screening
• USPSTF: Recommendation I : Insufficient evidence for or against screening of asymptomatic patients with– Low dose helical CT– CXR– Sputum cytology
• American Cancer Society: Interim guidance: – To discuss the NLST results in the appropriate setting
• NCCN: mentions possible mortality benefit in the right setting but makes no concrete recommendations
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Lung Cancer ScreeningWhat is the right setting ?
NLST and I- ELCAP: 2 landmark screening trials
•NLST National Lung Cancer Screening Trial:
Eligibility criteria•Patients aged 55-70•More than 30 pack year history of smoking•Smokers and non-smokers ( quit within last 15 years)•No metallic implants in chest or back•No prior history of lung cancer or symptoms suggestive of •Not home O2 dependent
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NLSTNational Lung Cancer Screening Trial
• 53,454 patients at 33 US medical centers
• High risk patients
• August 2002 through April 2004
• Randomized to 3 annual screenings
• Low dose CT vs CXR (PA view)
• And then surveillance for another 3.5 years
• Data collected through Dec 31st 2009
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Baseline characteristics of patients
Overall patients were
Younger
Better educated
Former smokers
Compared to the 2002-2004 US census survey
NEJM 365;5 Aug 4th 2011
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NLSTResults
Low dose CT
24% positive test result
Of which 96% false positive
1060 cancers
645 per 100,000 person years
247 deaths/ 100,000 person-years
CXR
6.9% positive test results
Of which 94% false positive
941 cancers
572 per 100,000 person years
309 deaths per 100,000 person-years
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NLST What is a positive test ?
• Non calcified nodule: CXR• Non calcified nodule > 4mm in size: CT• Adenopathy, Pleural effusion
NEJM; August 4th 2011
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NLSTFollow up of positive test results
Low dose CT18,146 positive results
•CT chest: 8,807 (50%)•PET: 1,471 (8.3%)•Per cut bx: 322 (1.8%)•Bronch: 671 (3.8%)•Surg bx: 713 (4.0%)
•Lung cancer 649 (3.6%)
CXR5043 positive results
•CT chest: 3,003 (60%)•PET: 397 (8.0%)•Per cut bx: 172 (3.5%)•Bronch: 225 (4.5%)•Surg bx: 239 (4.8%)
•Lung cancer 279 (5.5%)
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NLST Complication rate
Lung cancer diagnosed Low dose CT: (649)None = 71% (465)Major = 11% (75)Mod = 14% (95)Death = 1.5% (10) CXR group: (279)None = 76% (214)Major = 8.6% (24)Mod = 12.5% (35)Death = 3.9% (11)
No lung cancer diagnosed Low dose CT: (17,053) None = 99.6% (16,992)Major = 0.1% (12)Mod = 0.3% (44)Death = 0.1% (11) CXR group: ( 4,674)None = 99.7% (4,658)Major = 0.1% (4)Mod = 0.2% (9)Death = 0.1% (3)
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NLSTStage and Screening
Low dose CT
Stage
•IA 416/1040 40%
•IB 10%
•IIA 3.4%
•IIB 3.7%
•IIIA 9.5%
•IIIB 11.7%
•IV 21.7%
CXR
Stage
• IA 90/519 21.1%
• IB 10%
• IIA 3.4%
• IIB 4.5%
• IIIA 11.7%
• IIIB 13.1%
• IV 36.1%
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NLSTFinal Results
Diagnosis of lung cancer645 cases vs 572 low dose CT vs CXR Rate ratio, 1.13; 95% confidence interval (CI) 1.03 to 1.23
Cancer related mortality247 deaths per 100,000 person years vs 309Relative reduction of 20% 95% CI (6.8 to 26.7) P = 0.004
NEJM August 4th 2011
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NLSTMortality statistics
All cause mortality Lung cancer mortalityCT 1865/ 26722 = 6.9% 427/26722 = 1.59%CXR 1991/26732 = 7.4% 503/26732 = 1.88%
NEJM August 4th 2011
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Lung cancer screening Summary
• Low dose helical CT does detect more lung cancer
• These lung cancers are at an earlier stage
• High false positive rate
• Lower lung cancer death rate– Relative risk reduction 20%
– Absolute risk reduction < 1%
• Lower lung cancer death rate offset by higher cardio-respiratory complications and death
• All cause mortality marginally better with screening
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Colon cancerScreening
•Colorectal cancer is the third most common type of cancer•Leading cause of cancer death in the US
•Current levels of screening lag other effective cancer screening tests•Effective screening can save over 18,000 lives a year
•Screening guidelines do not apply to – Lynch syndrome, FAP syndrome– Inflammatory Bowel Disease
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Date of download: 10/13/2012
Copyright © The American College of Physicians. All rights reserved.
From: Screening for Colorectal Cancer: U.S. Preventive Services Task Force Recommendation Statement
Ann Intern Med. 2008;149(9):627-637. doi:10.7326/0003-4819-149-9-200811040-00243
Screening for colorectal cancer: clinical summary of a U.S. Preventive Services Task Force (USPSTF) recommendation.For a summary of the evidence systematically reviewed in making these recommendations, the full recommendation statement, and supporting documents, please go to http://www.preventiveservices.ahrq.gov. FOBT= fecal occult blood testing.
*These recommendations do not apply to individuals with specific inherited syndromes (the Lynch syndrome or familial adenomatous polyposis) or those with inflammatory bowel disease.
Figure Legend:
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Colon cancerScreening Tools
• Fecal Occult Blood Test: FOBT– Hemoccult II / SENSA
• Fecal Immunochemical Test: FIT
• Sigmoidoscopy• Colonoscopy
• Not recommended– CT Colonography– Fecal DNA test
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Colon Cancer ScreeningStool Tests
• Overall sensitivity for cancer = 70%• Specificity > 90% ; less than 10% false positive rate
• Hemoccult tests for peroxidase activity of heme– Dietary heme (fruits and vegetables especially if raw)– Red meat– Vitamin C
• FIT: Fecal Immunochemical Test tests for human heme
• Fecal DNA tests for denovo/ somatic mutations in the mucosal lining of the bowel
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Colon Cancer ScreeningEndoscopic tests
Colonscopy
• Perforation: 3.8/ 10,000
• M. Bleeding: 12.3/ 10,000
• Serious complic: 25/ 10,000– Perforation
– Major bleeding
– Diverticulitis
– Sev abdominal pain
– Hospital admission
– Cardiovascular events
– Death
Sigmoidoscopy
• Perforation: 4.6/ 10,000– Point estimate
• Serious complic: 3.4/ 10,000
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Untoward and Unexpected side effects of …..
colon cancer screening
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Colon Cancer ScreeningNet Benefit
• Annual high sensitivity fecal occult blood testing– 256-259 life years gained for every 1,000 persons screened
– 2654 colonoscopies per 1,000 persons over 10 years
• Flex- Sig every 5 yrs + FOBT every 3 yrs– 257 life years gained for every 1,000 persons screened
– 1655 colonoscopies per 1,000 persons over 10 years
• Colonoscopy every 10 years– 271 life years gained for every 1,000 persons screened
– 3756 total colonoscopies per 1,000 persons over 10 years
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Colon Cancer Screening Summary
• Start- age 50 : stop- age 75
• Screening vs Surveillance guidelines
• Do not recommend routine screening: ages 75-85
• Recommend against any screening after age 85
• Subsets where screening guidelines do not apply
• Positive result colonoscopy : gold standard
• CT colonography, Fecal DNA: Grade I recommendations
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Breast Cancer Screening
• Commonest cancer in women worldwide
• Most common cause of cancer related death world wide
• Second most common cause of cancer death in the US
• Lifetime risk in the US: 1 in 8
• Screening guidelines not applicable > 20-25% lifetime risk– Based on genetic testing
– Strong family history
– Prior chest wall irradiation
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Risk factors for Breast Cancer
Risk assessment tools
Gail model
Claus model
NEJM September 15th 2011
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Date of download: 10/13/2012
Copyright © The American College of Physicians. All rights reserved.
From: Screening for Breast Cancer: U.S. Preventive Services Task Force Recommendation Statement
Ann Intern Med. 2009;151(10):716-726. doi:10.7326/0003-4819-151-10-200911170-00008
Screening for breast cancer using film mammography: clinical summary of USPSTF recommendation.For a summary of the evidence systematically reviewed in making these recommendations, the full recommendation statement, and supporting documents, please go to www.preventiveservices.ahrq.gov.
Figure Legend:
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Risks of Screening Mammography
• False positive results– More common in younger women ( 49% over 10 years)
– Short term anxiety
– possible small but significant risk of long term effects
– Other associations
• False negatives– Insufficient data
• Radiation risk– 86 cancers and 11 deaths / 100,0000 women screened
• Over diagnosis ?
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Date of download: 10/13/2012
Copyright © The American College of Physicians. All rights reserved.
From: Screening for Breast Cancer: U.S. Preventive Services Task Force Recommendation Statement
Ann Intern Med. 2009;151(10):716-726. doi:10.7326/0003-4819-151-10-200911170-00008
Screening for breast cancer using methods other than film mammography: clinical summary of USPSTF recommendation.For a summary of the evidence systematically reviewed in making these recommendations, the full recommendation statement, and supporting documents, please go to www.preventiveservices.ahrq.gov.
Figure Legend:
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Incidence of Breast CancerSEER data: NCI 2010
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Risk reduction in Breast cancerRelative or Absolute
NEJM 365:11
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Breast cancer screening groups
Annals of Internal Medicine; 17 November 2009
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Models & Screening strategy
Percentage of breast cancer mortality reduction
vs
Number of mammograms
Per 1,000 women
Annals of Internal Medicine; 17 November 2009
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Breast cancer screeningAnnual vs Biennial
Annals of Internal Medicine; November 2009
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Risk vs Rewards Age and breast cancer screening
Annals of Internal Medicine; 17 November 2009
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Guidelines Galore
Warner E. N Engl J Med 2011;365:1025-1032.
NEJM: September 15, 2011
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Breast Cancer ScreeningSummary
• Do not screen prior to age 40
• Discuss screening age 40 -49
• Routine screening age 50 onwards: every 1-2 years
• Possibly stop screening at age 75
• Encourage “ Breast awareness”
• May consider clinical breast exam ? Annual ? Start age 40
• Do not hesitate to exam and image the breast, no matter what age, if clinical symptoms or signs warrant it
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Prostate cancer overview
• Annual data in the US– 240,000 new diagnoses
– 28,000 deaths
• Median age at diagnosis: 67 years
• Median age at death: 81 years
• Autopsy studies reveal occult prostate cancer– 30% of men older than 50 years
– 70% of men older than 70 years
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Prostate CancerThe Big Picture
NEJM November 2011
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The case for or against the PSA
90 % of cases diagnosed in the US are due to screening
Lifetime risk doubles
9% to 16% with PSA
Causes of raised PSA
BPH, infection, ejaculation, perineal trauma
instrumentation, cancerNEJM November 2011
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Prostate cancer screeningThe guideline wars
NEJM November 2011
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European Randomized Study of Screening for Prostate Cancer
• ERSPC
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ERSPC
Cancer diagnoses 8.2 % screening group 4.8% control group
Cancer death 2.8 per 1000: screening 3.5 per 1000: control 20% relative risk reduction
To prevent 1 deathneed to screen 1410 ptsneed to dx 48 cancersover 9 years
NEJM March 2009
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PLCO Project1993-2001: 76,693 patients
Annual PSA + DRE
vs
Usual care
2820 cancers: screen
2322 cancers: control
50 deaths: screen
44 deaths: control
Contamination rate: 40%
NEJM March 2009
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PLCO ProjectProstate Lung Colon Ovarian
NEJM March 2009
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SPCGScandinavian Prostate Cancer Group
• Enrolled 1989-1999 follow up through 2009
• 695 patients
• Localized prostate cancer – T1-T2 lesions
– PSA < 50
– Negative bone scan
• Predominantly diagnosed with symptoms and not PSA screening
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SPCG-4
Radical prostatectomy vs Watchful waiting695 pts12.8 years
347 166 55348 201 81
Prostate cancer related mortality 14.6 % vs 20.7%
Need to treat = 15
NEJM May 2011
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PIVOT
Prostate cancer intervention vs observation trial
1994-2002
44 V.A and 8 NCI sites
Any grade histology
Median age: 67
Median PSA: 7.8
T1c disease: 50%
Gleason >/= 7: 48%
NEJM July 2012
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PIVOTProstate Cancer Intervention vs Observation Trial
• All cause mortality
• 171 (47%) vs 183( 49.9%)
• HR: 0.88, p=0.22
• Prostate cancer mortality
• 21 (5.8%) vs 31 (8.4%)
• HR: 0.63, p=0.09
• Median survival 13 yrs
• Subgroup analysis showed benefit in PSA > 10 and
NEJM July 2012
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Treatment related ToxicityProstate Cancer
NEJM July 2012
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Prostate cancer screeningSummary
NEJM November 2011
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Cancer screening summary
• Cervical cancer: Screening works. Target the unscreened• Colon cancer: Screening works. Needs larger adoption.
• Lung cancer: Not ready for mainstream? Target high risk groups.
Fraught with issues
• Breast cancer: Screening works but who and how often. Benefits are possibly more modest than expected.
• Prostate cancer: Screening unlikely to decrease mortality.
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