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Boston Marathon Favorite Spencer The Dog Undergoes Surgery

ASHLAND (CBS) – Spencer the dog, a fan favorite during the Boston Marathon, is dealing with some serious medical concerns.

Each year Spencer roots for runners along the marathon route in Ashland.

BUMP_SPENCER THE MARATHON DOG
Spencer the Marathon Dog (Photo Via Rick Powers)

Spencer's owner Rich Powers said the 12-year-old dog had a tumor as well as his spleen removed.

In a Facebook post, Powers said the surgery went well and they are waiting to see if the tumor is cancerous.

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