Maryland House Speaker Michael E. Busch (D-Anne Arundel) underwent a liver transplant Thursday for a condition he has attributed to skin-cancer medication.

Busch, 70, was diagnosed with liver disease from nonalcoholic steatohepatitis, and he learned last month that the problem was worsening, according to a statement from his office. His sister provided the organ donation through the University of Maryland Medical Center’s living-donor program.

“I will keep working through my recovery and I look forward to spending time with my family and getting back on the lacrosse field with my daughters; jogging with my dog; and working with the people of Annapolis,” he said in the statement.

Busch, who is the longest serving House speaker in Maryland history, filed for reelection last month. His energy level had been noticeably flagging in recent months, including on the last day of the legislative session, when he was absent from some of the proceedings.