Hansen reclaimed her indoor world title in March
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Britain's Ashia Hansen, who overcame a heel injury to regain the world indoor triple jump title in March, will have surgery in April to try to resolve the problem.
"I feel very positive about this operation. It's simply a
case of removing the piece of bone that shouldn't be there," she said in a statement on Thursday.
"Since the bone is not attached to my heel the risk of
damage to this area is greatly decreased."
The 31-year-old Commonwealth and European champion picked up the injury in January.
She had five painkilling injections at the world indoor championships in Birmingham before taking gold with a jump of 15.01m - the best in the world this year.
The American-born athlete, who holds the world indoor record, also won the world indoor title in 1999.