One goal is to spot cancer far earlier than
can be done now, when treatment is likely
to be most effective.
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Highlighting tiny clusters of cancer cells
should help doctors detect whether cancer
has spread, or is shrinking in response to
treatment -- without the need for surgery.
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Drugs encased in packages small enough to
slip through cancer cell walls kill tumors
without damaging healthy cells, reducing
the side effects of treatment.

(Globe Staff Graphic / Aaron Steckelberg)
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