Emelin is suffering from acute liver failure and will need a liver transplant, Sport-Express reports.
Emelin scored one goal and pitched in eight assists in 76 games during 2017-18, while averaging 16:53 of ice time and blocking 109 shots.
Emelin (upper body) is in the lineup for Tuesday's game against Minnesota, Brooks Bratten of the Predators' official site reports.
Emelin -- who is considered day-to-day with an upper-body injury -- took the ice for morning skate Tuesday, Brooks Bratten of the Predators' official site reports.
Emelin has failed to find the back of the next in seven consecutive outings.
Emelin recorded an assist for the second straight game in Tuesday's win over the Stars. He also dished out four hits and blocked two shots.
Emelin snapped a 12-game pointless drought with his third assist of the season in Saturday's 5-2 win over the Avalanche.
Emelin has just two assists in 14 games this season, and is currently riding a nine-game pointless drought.
Emelin recorded his first two points in a Predators jersey with a pair of assists in Tuesday's 4-1 win over the Avalanche.
Emelin has been logging time on the top defensive pairing the past three games, averaging almost 20 minutes per game alongside P.K. Subban.