(CNN) A professional dancer who lost part of her leg in the Boston Marathon terrorist bombing has been hospitalized after she was hit by a car while she was walking across a street.

"Struck by a car on Commonwealth Avenue, while on a crosswalk," Adrianne Haslet wrote on Instagram, next to a photo of her wearing a neck brace in a hospital bed. "Thrown into the air and landed, crushing the left side of my body. Yesterday. I'm completely broken. More surgery to come."

Haslet was a spectator at the finish line of the race on April 15, 2013, when two bombs went off in a terrorist attempt that claimed three lives.

"I felt the direct impact and it immediately blew off (part of) my left foot," she said.

Surgeons amputated the leg below the knee.

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