Franklin dealt with weight issues for years. In 1974, she dropped 40 pounds (18 kg) during a crash diet and maintained her new weight until the end of the decade. Franklin again lost the weight in the early 1990s before gaining some back. A former chain smoker who struggled with alcoholism, she quit smoking in 1992. Franklin admitted in 1994 that her smoking was "messing with my voice", but after quitting smoking she said later, in 2003, that her weight "ballooned".  In 2010, Franklin canceled a number of concerts after she decided to have surgery for an undisclosed tumor. Discussing the surgery in 2011, she quoted her doctor as saying it would "add 15 to 20 years" to her life. She denied that the ailment had anything to do with pancreatic cancer, as it was rumored. On May 19, 2011, Franklin had her comeback show in the Chicago theatre. In May 2013, Franklin canceled two performances to deal with an undisclosed medical treatment. Later in the same month, Franklin canceled three more concerts in June and planned to return to perform in July. However, a show of July 27 in Clarkston, Michigan was canceled due to continued medical treatment. In addition, Franklin canceled an appearance at an MLB luncheon in Chicago honoring her commitment to civil rights on an August 24 date. She also canceled a performance of September 21 in Atlanta due to her health recovery. During a phone interview with The Associated Press in late August 2013 Franklin stated that she had a "miraculous" recovery from her undisclosed illness but had to cancel shows and appearances until she was at 100% health, stating she was "85% healed". Franklin has since returned to live performing, including a 2013 Christmas concert at Detroit's Motor City Casino. She launched a multi-city tour beginning the summer of 2014, starting with a performance of June 14 in New York at the Radio City Music Hall.  In 2017, Franklin canceled a series of concerts due to health reasons. During an outdoors Detroit show, Franklin told the audience to "keep me in your prayers". In July 2017, Franklin reemerged, appearing to lose more weight before a performance at the Wolf Trap in Virginia.

Answer this question "was the surgery successful?" by extracting the answer from the text above.
she quoted her doctor as saying it would "add 15 to 20 years" to her life.