visited during the elder pianist's last four years to play for him. From 1973 to 2010, Perahia recorded exclusively for Columbia Masterworks, now Sony Classical. His first major recording project was Mozart's 27 piano concertos, conducted from the keyboard with the English Chamber Orchestra. In the 1980s, he also recorded Beethoven's five piano concertos, with Bernard Haitink and the Royal Concertgebouw Orchestra. In 2016, Perahia signed with Deutsche Grammophon. Hand injuries In 1990, Perahia suffered a cut to his right thumb, which became septic. He took antibiotics for this condition, but they affected his health. In 1992, his career was threatened by a bone abnormality in his hand causing inflammation, requiring several years away from the keyboard, and a series of operations. During that time, he says, he found solace through studying the music of Johann Sebastian Bach. After recovering, he produced a series of award-winning recordings of Bach's keyboard works in the late 1990s, including a notable rendition of the Goldberg Variations. In early 2005, Perahia's hand problem recurred, prompting him to withdraw from the concert stage on the advice of his doctors. He cancelled several appearances at the Barbican Centre, as well as a 10-city national tour of the United States, but returned with recitals in German cities in 2006 and at the Barbican in April 2007. In autumn of 2007, he completed a 10-city tour of the United States. Owing to his hand problem, and on the advice of his doctor, Perahia cancelled a February 2008 solo recital at the Barbican Centre and a tour in the United States with the Academy of St Martin in the Fields (March and April 2008). He returned to the platform in August 2008, touring with the Royal Concertgebouw Orchestra under the direction of Bernard Haitink, and had an Asian recital tour in October and November. Recent activities Perahia has recorded Chopin's études, and Schubert's late piano sonatas. He is currently editing a new Urtext edition of Beethoven's piano sonatas. Besides his solo career, he is active in chamber music and appears regularly with the Guarneri and Budapest String Quartets. He is also Principal Guest Conductor of the Academy of St Martin in the Fields, with which he records and performs. Since his return at the 2008 Proms season, Perahia has been continually active on the concert scene. Perahia appeared at Sir Neville Marriner's 90th birthday concert on April 1, 2014,