On December 10, the Chiefs looked to extend their "December home game winning streak" to 19 games when they took on the Baltimore Ravens.  The Chiefs previously won the past 18 games at home in December, leading back to their loss to the Indianapolis Colts on December 15, 1996.  The game was broadcast on CBS at noon Kansas City time.  Before the game, there was a moment of silence for ailing Chiefs owner and founder Lamar Hunt, who was still in the hospital seeking cancer treatment. Throughout the first half, it was a defensive fight with the Ravens getting a 41-yard field goal in the first quarter and a 23-yard field goal in the second quarter by kicker Matt Stover.  Within the first half, Trent Green committed three turnovers In the third quarter, Kansas City fell big as blown coverage allowed Steve McNair to complete an 87-yard touchdown pass to Mark Clayton.  The pass was the longest made by McNair in his career and Clayton's longest reception  The blown coverage would seal the loss for the Chiefs.  The score put the Ravens up 13-0 with just under 6 and a half minutes left in the third quarter.  Chiefs fans began to file out of Arrowhead Stadium, realizing their team lost for the first time in December at home in over a decade. In the late hours of Wednesday, December 13, Chiefs founder and owner Lamar Hunt died due to complications to prostate cancer at the age of 74.  Hunt had been in the hospital seeking cancer treatment since November 22.  Hunt was stricken with prostate cancer in September 1998 and underwent a series of chemotherapy treatments. In October 2003 he had surgery to remove the prostate gland. Hunt is survived by wife Norma, children Lamar Jr., Sharron Munson, Clark and Daniel; and 13 grandchildren.  Clark Hunt will oversee the family's sports interests.  On Thursday, December 14, before the Thursday Night Football game on NFL Network between the San Francisco 49ers and Seattle Seahawks, a moment of silence was held to honor Lamar Hunt.

Answer this question based on the article: How many years passed since Hunt was stricken with cancer to when he had his prostate removed?
5