Tenet Healthcare gains on lifting FY profit forecast

** Shares of hospital operator Tenet Healthcare THC rise 9.9% to $109 premarket

** Co raises FY adj. EPS forecast to range of $8.37-$9.41 from previous forecast of $5.76-$6.90

** Now expects FY revenue between $20 bln and $20.4 bln, compared with earlier forecast of $19.9-$20.3 bln

** Co's Q1 results also beat estimates

** Up to last close, THC stock has gained 31.2% so far this year