Dr. Alan Yasko was an internationally known bone cancer surgeon and chief of musculoskeletal oncology at Northwestern University's Lurie Cancer Center.
Yasko's expertise made headlines in March when he performed a nearly two-hour surgery on first lady Maggie Daley to strengthen a right leg damaged by a malignant bone tumor.
Mayor Daley talked about the doctor at a park dedication Tuesday morning, calling Yasko a good friend.
Yasko was just 51 years old when he died of a pulmonary embolism last Thursday while attending a medical conference in Cancun, Mexico.
