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Evaluation ofChildhood Cancer Incidence
in Sandwich, MA: 1995 - Present
Massachusetts Department of Public HealthCenter for Environmental HealthCommunity Assessment Program
February 28, 2006
Center for Environmental Health (CEH)
Protect the public health from a variety of environmental exposures
Respond to environmental health concerns and provide communities with epidemiologic and toxicological health assessments
Community Assessment Program (CAP)
Evaluate frequency and patterns of disease in the population
Respond to concerns about suspected disease patterns or “clusters”
Investigate possible associations between environmental exposure and disease
Reason for Investigation
Concerns about increased cancer incidence among children
Requested by: Concerned resident from Sandwich A specific environmental concern was not
reported to CAP
Reports of more recent diagnoses of cancer among children
Steps in the Investigation
Cancer evaluation Calculate cancer incidence rate among children
diagnosed during time period 1995-2002 Review cancer types diagnosed (1995 – present) Evaluate geographic and temporal patterns of
childhood cancer (1995 – present)
Evaluate potential environmental concerns Public drinking water Location of groundwater plumes from MMR
Geographic Distribution
Map locations of residence reported at time of diagnosis
Evaluate spatial patterns of childhood cancer in neighborhoods within each community
Evaluate patterns of childhood cancer in relation to environmental sources (e.g. MMR plumes)
Childhood Cancer Statistics
12,158 children in the United States were diagnosed with cancer in 2002
267 children in Massachusetts were diagnosed with cancer in 2002
Cancer in Children Versus Cancer in Adults
CHILDREN Different cancers may
be more similar with respect to risk factors
Little information is known about risk factors
ADULTS Different cancers are
different diseases
Much is known about risk factors for a number of cancer types
Cancer in Children Versus Cancer in Adults (cont’d)
Common Childhood Cancers
Leukemia
CNS tumors
Bone tumors
Common Adult Cancers
Lung
Colon
Breast
Prostate
Statistical Methods
Standardized Incidence Ratio (SIR)
SIR = Observed # of cases
X 100Expected # of cases
95% Confidence Interval
Massachusetts Cancer Registry (MCR)
Population-based surveillance system established in 1982
Massachusetts law requires reporting of all newly diagnosed primary cancers in MA residents
Confidential database
MCR (cont’d)
Statewide and city/town data are complete through 2002 Data for 2003 being prepared for release soon
Diagnoses reported to the MCR after 2002 are available for review
Contacted treatment facilities and the Rhode Island cancer registry
Cape Cod Childhood Cancer: 1995 – 2002
Town Observed Expected SIR 95% CI
Barnstable 14 14.4 97 53-163
Bourne 3 6.2 NC NC
Brewster 4 2.9 NC NC
Chatham 1 1.3 NC NC
Dennis 0 3.8 NC NC
Eastham 0 1.3 NC NC
Falmouth 9 9.3 96 44-183
Harwich 0 3.1 NC NC
Mashpee 7 4.0 175 70-361
Orleans 1 1.2 NC NC
Provincetown 0 0.5 NC NC
Sandwich 10 7.5 133 64-245
Truro 1 0.5 NC NC
Wellfleet 2 0.7 NC NC
Yarmouth 6 5.9 101 37-220SIR and 95% CI not calculated when Observed is less than 5
Review of Cape Cod Childhood Cancer
From 1995-2002, the observed number of diagnoses was near or below the number of expected cases for the majority of towns on Cape Cod
Preliminary review of more recent MCR data did not suggest patterns similar to those in SE Sandwich
Childhood Cancer Incidence in Sandwich, MA: 1995-2002
Observed Expected SIR 95% CI
Males 3 4.0 NC NC
Females 7 3.5 200 80-412
Total 10 7.5 133 64-245
Childhood Cancer Incidence in Sandwich Census Tracts: 1995-2002
Census tracts
Total Males FemalesOBS EXP SIR 95% CI OBS EXP SIR 95% CI OBS EXP SIR 95% CI
0133 1 0.9 NC NC 0 0.4 NC NC 1 0.4 NC NC
0134 2 1.3 NC NC 1 0.7 NC NC 1 0.6 NC NC
0135 5 2.6 192 62-449 1 1.4 NC NC 4 1.2 NC NC
0136 2 2.7 NC NC 1 1.4 NC NC 1 1.2 NC NC
Town 10 7.5 133 64-245 3 4.0 NC NC 7 3.5 200 80-412
Cancer Types Diagnosed1995-2002
Leukemia 3 children
CNS Tumor 3 children
Soft Tissue Sarcoma 2 children
Lymphoma (Hodgkin’s Disease)
1 child
Bone 1 child
Distribution of Childhood Cancer Diagnoses: 1995 - 2002
0
1
2
3
1995 1996 1997 1998 1999 2000 2001 2002
Cancer Types Diagnosed2003-2005
Leukemia 3 children
CNS Tumor 2 children
Bone 2 children
Distribution of Childhood Cancer Diagnoses: 2003 - 2005
0
1
2
3
4
2003 2004 2005
What Do We Know About Childhood Cancer?
Leukemia Most common type among children Incidence highest in ages 2-3 Pre-existing medical conditions (e.g., Down’s syndrome) Treatment with ionizing radiation Exposure to drinking water contaminated with solvents and
metals during pregnancy
CNS Tumors 2nd most common type Ages 15 years and younger Pre-existing medical conditions (e.g., Neurofibromatosis) Family history Treatment with ionizing radiation
What Do We Know About Childhood Cancer?
Hodgkin’s Disease (HD) Ages 15-19 Family history of HD Infection with Epstein Barr virus History of infectious mononucleosis
Bone (Ewing’s) Peak in incidence between ages 10 to 20 White children Other than race, no environmental factor or other
characteristic has yet been shown to be a strong risk factor
What Do We Know About Childhood Cancer?
Soft Tissue Sarcoma Rhabdomyosarcoma is the most common soft tissue
sarcoma in children Age less than 1 and children ages 15-19 Pre-existing medical conditions (e.g., Li-Fraumeni
syndrome, Beckwith-Wiedemann syndrome and Neurofibromatosis)
Treatment with ionizing radiation Exposure to pesticides
Summary of Results1995-2002
Town-wide cancer incidence occurred more often than expected Incidence among males slightly less than expected Females were diagnosed more often than expected
The number of diagnoses per year varied between 0 and 2
Age and cancer types diagnosed were consistent with literature
Summary of Results1995-2002
For 3 of 4 Sandwich CTs observed was close to the expected
From 1996-1999, 4 females residing in CT 0135 were diagnosed with cancer (versus 1.2 expected) 2 were diagnosed with leukemia 1 diagnosis of bone cancer 1 diagnosis of a soft tissue sarcoma
Summary of Results 2003 – 2005
From 2003-2005, 7 children were diagnosed with cancer 3 were diagnosed with leukemia 2 diagnoses of a CNS tumor 2 diagnoses of bone cancer
Age and cancer types diagnosed were consistent with literature
Geographic Distribution 1995 - 2005
Two areas noted in CT 0135 3 of the 6 children with leukemia lived in southeast
Sandwich at the time of diagnosis 2 children diagnosed with bone cancer lived in fairly
close proximity to one another in southern Sandwich
Environmental Review
Distribution did not appear to correspond to areas potentially affected by MMR plumes
Since 1993, no violations in Sandwich municipal drinking water (other than total coliform)
% of housing units on public water (estimate)* CT 0133 100% CT 0136 90% CT 0134 55% CT 0135 36%
*Source: 1990 US Census Data
Recommendations for Follow-up
Conduct interviews with biological mother of children diagnosed with cancer in Sandwich from 1995-present Pregnancy history Family medical history More complete residential history Parental occupational history
Conduct interviews with mothers of children diagnosed with cancer from 1995-present in Mashpee and Barnstable Request MCR to contact treatment facilities
Recommendations for Follow-up(cont’d)
Work with local health officials to obtain updated information on private well use
To extent possible, review additional environmental factors of concern to community
Next Steps
Approval of 24A application (early March meeting)
Mailing to parents with children diagnosed with cancer in Sandwich, Barnstable, and Mashpee during 1995-present
Obtain written consent from parents
Schedule and conduct interviews; collect medical records; obtain available environmental data
Data analysis
Prepare summary report of findings
Schedule public release
Contact Information
The full report is available at: http://www.mass.gov/dph/ceh.
CAP staff can be reached at: Phone: (617) 624-5757
Fax: (617) 624-5777