A triumph of tenacity: Thirty-two years ago, the pianist Leon Fleisher was at the height of a brilliant career when he lost the use of his right hand to what is now recognized as repetitive stress syndrome.

But over the years he persisted, seeking various forms of treatment and performing compositions for the left hand. Earlier this month, the 67-year-old Fleisher gave his first recital in New York, at Carnegie Hall. He performed a variety of compositions for the left hand, including three written for him by Leon Kirchner, Jean Hasse and Robert Saxton."There are more than 1,000 pieces for the left hand alone," he said recently, "and I was delighted to bring these seldom-if-ever-heard compositions to attention."

On Jan. 13, he will mark another milestone at Carnegie Hall, using both hands to play Mozart's Piano Concerto No. 12 with Andre Previn and the Orchestra of St. Luke's.

He has already played it three times this year in other cities and attributes the breakthrough to a kind of therapy called rolfing. "It is a form of manipulation of the connective tissue that I've been getting for about 10 months," he said.

But Fleisher is not giving up his left-hand works yet. "I don't want to push it," he said. "I'm doing what I can."