Quiz: What Are Cancer Clusters?

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1. Q1.What is a cancer cluster?

   AA greater-than-expected number of the same cancer in a group, place, or timeBA single case of cancerCA type of cancer treatmentDA support group for patients

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2. Q2.A meaningful cluster usually involves what?

   AMany different unrelated cancersBOne specific cancer typeCOnly childhood cancersDCancers in different countries

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3. Q3.What do most suspected clusters turn out to be when studied?

   ACaused by pollutionBCaused by one clear sourceCCoincidenceDContagious

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4. Q4.How do health departments investigate a suspected cluster?

   AThey compare reported cancers with the number normally expected for a group of that size and ageBThey ask residents to voteCThey ignore the reportsDThey test the water only

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5. Q5.Why is pinpointing a cause difficult even when a real excess is found?

   ABecause causes are always obviousBBecause clusters never have a causeCBecause there are long delays between exposure and diagnosis and people move over timeDBecause cancer is very rare

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This quiz checks understanding of educational content only. It is not medical advice. Read: What Are Cancer Clusters?.