Quiz: Photodynamic Therapy

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1. Q1.According to this article, what does photodynamic therapy use to kill cancer cells?

   AA drug activated by light, called a photosensitizerBExtreme coldCHigh-dose radiation from a machineDA donor's stem cells

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2. Q2.According to this article, why is photodynamic therapy only used for tumors on or just below the surface?

   ABecause the drug is too weakBBecause the light cannot pass more than about 1 centimeter into tissueCBecause it is too expensiveDBecause deeper tumors do not absorb the drug

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3. Q3.According to this article, how long after getting the photosensitizer is the tumor usually exposed to light?

   AImmediatelyBAfter 24 to 72 hoursCAfter 6 weeksDAfter one year

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4. Q4.According to this article, what is one benefit of photodynamic therapy?

   AIt works on very large, deep tumorsBIt does not cause scarringCIt makes you radioactiveDIt never has side effects

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This quiz checks understanding of educational content only. It is not medical advice. Read: Photodynamic Therapy.