Dmitri Hvorostovsky has confirmed that he will return to the stage in April for a joint concert with Anna Netrebko.

The baritone, who is fighting a brain tumor plans to appear on stage twice on April 25 and April 29. The first concert will take place in Toronto with Netrebko and her husband Yusif Eyvazov at the Four Seasons featuring arias, duets and trios. The second concert will be a recital in Dublin with Hvorostovsky’s frequent collaborator Ivari Ilja.

Hvorostovsky has not performed since December when he announced that he would cancel all operatic productions indefintely. However, the Teatro Liceu did recently reveal that the baritone is still scheduled to sing two productions for its 2017-18 season.

In the summer of 2015, Hvorostovsky was diagnosed with a brain tumor. Despite getting medical treatment, he continued performing and made his comeback in the Metropolitan Opera’s production of Verdi’s “Il Trovatore.” However, in late September 2016, the singer had to withdraw from his engagements in Verdi’s “Simon Boccanegra” at the Vienna State Opera while in December 2016, he canceled his planned debut performances of Verdi’s Don Carlos at Moscow’s Bolshoi Theater. He later canceled performances at the Met Opera’s revival of Tchaikovsky’s “Eugene Onegin.”