Oldest gorilla doing well after biopsy B

powell, ohio» The oldest known gorilla living in a zoo is doing well after a surgical biopsy ahead of her 60th birthday on Dec. 22.

The Columbus Zoo and Aquarium said Saturday that veterinarians successfully removed a mass under the gorilla’s arm that recently started causing her discomfort.

The zoo also took tissue samples from the gorilla, a female named Colo, to determine the cause and possible treatment. She also got a thorough medical checkup.

Colo was the first gorilla born in a zoo. She has surpassed the usual life expectancy by two decades.