Tampa, FL (SportsNetwork.com) - Tampa Bay Lightning forward Ryan Callahan underwent an emergency appendectomy on Monday and will be out indefinitely.
According to the Tampa Tribune, Callahan missed Monday's practice and was later sent to Tampa General Hospital after feeling discomfort. He was diagnosed with acute appendicitis following testing and had his appendix removed.
Callahan tallied three assists in 12 games this postseason after posting 24 goals and 54 points over 77 games in the regular season.
The Lightning hold a 3-2 series lead against the Montreal Canadiens in the Eastern Conference semifinals and will look to wrap up the series Tuesday at home.