Tabloids' predictions that actor Michael Landon will be dead within days due to his battle against pancreatic cancer anger his doctor.

"People who have never seen him and are unfamiliar with his treatment are trying to establish a prognosis," snorts Dr. Cary Presant, chairman of L.A.'s Oncologic Institute. "It also angers Michael."Presant refuses to issue any prognoses of his own.

Meanwhile, cancer increases Landon's popularity. His appearance on NBC's "The Tonight Show" boosted the program to a 29 percent audience share, the show's highest rating in more than a decade.

- LOOK FOR PRODUCER George ("Star Wars") Lucas to mount a challenge to Nintendo. Lucasfilm Games hired away bow-tied computer whiz Howard Phillips, lately featured in some Nintendo ads, to supervise development of video games and educational software.

- NOT CONTENT to be a captive of lawsuits over singing credit on some of her recordings, Paula Abdul forms her own record label, Captive Records. Captive titles will be distributed by Abdul's established label, Virgin Records, but Abdul will be free to sign and develop a stable of her own artists.

- ALEC BALDWIN, star of Disney's "The Marrying Man," calls the movie "the biggest mistake of my career" and goes on to trash the studio in an Entertainment Weekly interview.

"A Disney movie is cheap and looks cheap," the actor gripes. "Disney is about a bunch of guys who took the real creative beauty of a legendary studio and . . . strip-mined the (stuffings) out of it and lined their own pockets."

- PHYLLIS DILLER'S Brentwood home is scene of a June 2 celebrity art auction featuring works by Anthony Quinn, Henry Fonda, Dinah Shore, Red Skelton and others. Proceeds to Jim Backus Memorial Fund of the National Parkinson Foundation.

- ITALIAN SEXPOT Laura Antonelli received a 31/2-year suspended sentence, pays a $19,000 fine for possession of 11/4 ounces of cocaine, found by police at her home 30 miles north of Rome last month.

- FRED HAYMAN'S on Beverly Hills' Rodeo Drive is bidding to become shopping headquarters for sports stars. Shoppers on one recent day: tennis phenom Jennifer Capriatti, buying a dress to wear to a Martina Navratilova party; L.A. Dodger manager Tommy Lasorda, buying a navy blue blazer to wear in his next diet drink commercial; ex-Detroit Tiger pitcher and ex-con Denny McLain, picking out a sport shirt and a bottle of fragrance; and ex-Green Bay Packer all-pro Willie Davis, who left with an armful of gifts for friends.