dr samuel so hep b liver ca summit
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Dr. Samuel So Director, Asian Liver Center Stanford UniversityTRANSCRIPT
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Samuel So, MBBS, FACSLui Hac Minh Professor
Professor of SurgeryDirector, Asian Liver Center
Stanford University School of Medicine
Manila, February 2014
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Liver Cancer 7th most common cancer in the
worldRanks 2nd in causing the most
cancer deaths each year (746,000 deaths in 2012)
Among the most deadly cancers with a mortality to incidence ratio of 0.95
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Western Pacific Region has the Greatest Burden of Liver Cancer in the World
WPRO accounts for 66% of new liver cancercases and deaths each year
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Top 5 Causes of Cancer Deaths in the Philippines
Men Women Both Sexes
1 Lung Breast Lung
2 Liver Cervix Breast
3 Prostate Lung Liver4 Colorectal Colorectal Colorectal
5 Leukemia Liver Leukemia
Source: GLOBOCAN 2012, (IARC)
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GLOBOCAN 2012 (IARC)
Liver cancer deaths will double in 20 yrs
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Liver Cancer is A Leading Cause of Cancer Death in Countries where Chronic Hepatitis B is Prevalent
Source: WHO International Agency for Research on Cancer, GLOBOCAN 2008 http:// http://globocan.iarc.fr/ US CDC, <http://www.cdc.gov/mmwr/PDF/rr/rr5708.pdf>
Chronic hepatitis B prevalence
Liver cancer ranking as cause of cancer death in
men Thailand ≥ 7% 1Vietnam ≥ 7% 1China ≥ 7% 2Korea ≥ 7% 2Philippines ≥ 7% 2Indonesia ≥ 7% 3Singapore ≥ 7% 3Malaysia ≥ 7% 4India ~ 3% 7Australia < 2% 11New Zealand < 2% 12
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Transmission of HBVTransmission of HBVBirth: From an infected mother to
newborn at birth (about 40% of chronic HBV infection in Asia)
Blood: Direct contact with infected bloodUnsafe injections or transfusions in the
Healthcare setting cause up to 20 million infections a year
Open wound contact, sharing contaminated toothbrush or razors
Sharing or reusing needles for tattoos, piercing and drug use
Sex: Unprotected sex
CDC. Available at: www.cdc.gov/ncidod/diseases/hepatitis/b/faqb.htm
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Global Elimination of Hepatitis B Global Elimination of Hepatitis B Transmission is FeasibleTransmission is Feasible1981, the first
hepatitis B vaccine was FDA approved. World Health Organization calls “The First Anti-Cancer Vaccine”
3 Shots given over 6 monthscan ProtectYou for Life
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1~ 5~ 10~ 15~ 20~ 30~ 40~ 50~0
2
4
6
8
10
12
HB
sAg
Pre
vale
nce
(%
)
1992
9.710.2
11.3
9.
6
11.5
Age (Yrs)
1.0 1.4
3.2
5.4
2006
8.2 8.1 8.38.0
9.99.3
7.6
Liang X, et al. Vaccine 2013 (in press)Liang X, et al. J Infect Dis 2009; 200: 39-47Courtesy of Prof Zhuang Hui, PKU
Hepatitis B Immunization would Reduce the Future Burden of Chronic Hepatitis B infection and Liver Cancer
in China
Impact of infant immunization after 14 years:Prevented up to 20 million chronic infectionPrevented up to 3.5 million future deaths from liver cancer and liver disease
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WHO Western Pacific Region Hepatitis B Control Goal
In 2005, all member states adopted the goal to reduce prevalence of chronic hepatitis B to < 2% among children 5 years of age by 2012.Hepatitis B birth dose coverage (given within 24
hours) over 65%Hepatitis B complete 3 dose coverage over 85%
In 2013, all member states adopted a new goal to reduce prevalence of chronic hepatitis B to < 1% among children 5 years of age by 2017.
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Founded in 1996 to address the disproportionately high prevalence of chronic hepatitis B and liver cancer in Asians and Asian Americans (funded by donations, foundations and federal grants)
Goal: eliminate HBV transmission, stigma and complications, and reduce the incidence and mortality of HCC worldwide
Focus on addressing the gaps in education, prevention, treatment and country policies by a four-pronged approach C - collaboration (public and private)A - evidence-based advocacy (guide country policies)R - research (liver cancer and health policy)E - education (public, healthcare providers, policy
makers) Liver.stanford.edu
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ALC: Spearheads efforts leading to Changes in U.S. Policies to Address the Gaps in HBV Prevention and Control
2008, Office of Minority Health recognized chronic HBV infection in Asians and Pacific Islanders as a serious and frequently neglected national health disparity
2008, CDC updated hepatitis B screening guidelines2010, Institute of Medicine report on a national
strategy on prevention and control of hepatitis calls for the nation to act now
Partner with legislators: Hepatitis and Liver Cancer Bills introduced in Congress
(2009, HR 3974) and Senate (2010) 2010 Resolution passed by state of California to recognize
Hepatitis Awareness Week in May2012, CDC updated guidelines for HBV infected
healthcare workers
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Recognized as the universal symbol to raise awareness about HBV and liver cancer
and support those living with hepatitis B
Bringing the CommunitiesTogether to Fight Hepatitis B and Liver Cancer:
Jade Ribbon
Jade = Good health and longevity
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Advocacy: Increase WPRO and Country Level Capacity in Viral Hepatitis Prevention and Treatment
Partner with US CDC and advocate to policy leaders
& donors (including Zeshan Foundation)to support & strengthen WPRO viral hepatitis B initiatives:FT Hepatitis staff in ChinaP5 Hepatitis medical officer
and admin in WPROALC/APAVH provide partial
funding to create WPRO Hepatitis B website and funding/messaging for annual WHD activities
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Vietnam, Hanoi, 2012 Phu Tho field visit & Hanoi,2013
Mongolia, 2013
Lao PDR, 2011
Partner withUS CDC toSupport theNational Workshop onHepatitis Prevention and Control to develop 2013-2017 national action plan
Invited by MOH to assist indevelopingcommunicationsand training toolsand strategies
Developed bannersto improve infant immunization
Partner withMOH in Lao PDRand WHO
Invited by vice Minister of Healthto identify nationalpriorities beyond infant immunization
Partner with WHO country office and FIRE (NGO)
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Sept 2004: ALC and ACS invited to Manila to Examine Ways to Improve Liver Cancer Prevention and Control by Philippine Cancer Society, DOH and Philippine Gastroenterology Society
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Recommendations Made at Interactive Panel Discussion on Liver Cancer, Manila, Sept. 2004
Include Hep B vaccination in the national free infant immunization program
Give the first dose within 24 hours of birth
Two recommendations
Senator Pia Cayetano led the fightin making these changes into Law.
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Cancer screening
Cancer screening
* Wong SN et al. WJH 2013
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Early detection of HCC by ultrasound and AFP Screening of HBsAg positive Persons to Improve Survival
Small 1.2 cm HCC detected on routine screening in “healthy” 53 year old Asian HBV carrier with normal AFP and ALT
Arterial phase CT Venous phase CT
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Challenges and Limitations in HCC TreatmentGlobal mortality to incidence ratio of liver cancer is 0.95More complicated than other cancers because most
patients have 2 diseases:Liver cancer Cirrhosis (often from underlying chronic viral hepatitis)
Both can be fatal. The severity of the underlying cirrhosis limits cancer treatment option and outcome.
<30% are resectable at presentationSystemic chemotherapy is not very effectiveTransplantation and TACE treatments are expensiveRecurrence rate after initial treatment is high, so costly
longterm surveillance with CT/MRI scans and repeat treatments for recurrence are necessary to improve survival
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* Wong SN et al. WJH 2013
Antiviral Rx
Antiviral Rx
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New oral suppressive antiviral therapies are highly effective with low drug resistanceOne of them (tenofovir) is the same drug
that the health system in the Philippines is using to treat HIV/AIDS.
Putting patients with liver damage on antiviral therapyCan prevent disease progression and
reduce risk of death and costly complications associated with liver cirrhosis and liver cancer
Without appropriate chronic disease management, 15-25% of chronically infected persons will die from liver cancer or liver disease
Lok,McMahon. AASLD practice guideline:chronic HBV: Update 2009. Hepatology 2009; 50(3):1-362012 Physician’s guide to hepatitis B. A silent killer. Asian Liver Center, 2011
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85% reduction in deaths from cirrhosis
Toy, M et al. Hepatology 2014, in press
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VaccinationEliminate mother to child transmissionSafe injection and blood banking Protected sex
monitoring
Cancer screening
Cancer screening
Antiviral RxAntiviral Rx
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2010 Institute of Medicine Report on Hepatitis 2010 Institute of Medicine Report on Hepatitis and Liver Cancer: Major Hurdle in Chronic Viral and Liver Cancer: Major Hurdle in Chronic Viral Hepatitis Prevention and ControlHepatitis Prevention and Control
Lack of Public Awareness Lack of Provider Awareness
Lack of Public Resource Allocation
Morbidity and Mortality related to hepatitis B and hepatitis C
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JRC: Uniting the Community to Prevent and Treat Hepatitis B
San Francisco: First City in the US to test, vaccinate or treat all Asians and Pacific Islanders for hepatitis BMake routine hepatitis B testing by PCP the standard of careSee a doctor who will test you
Meredith et al. J Community Health, 2011
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Hepatitis B Infant Vaccination Coverage
Source: WHO
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