LOS ANGELES (AP) _ A man who says he was Rock Hudson's lover filed a $10 million lawsuit today charging that the late actor, doctors and two other people conspired to hide the fact that Hudson had AIDS.

In the suit and in a separate $10 million claim filed against Hudson's estate, Marc Christian, 31, said he is living in ''extreme fear that at any moment he will receive a death sentence'' by learning that he contracted acquired immune deficiency syndrome from the actor.

''It is probable that claimant has contracted AIDS from Hudson, and as a consequence, will incur medical expenses to prolong claimant's life and make his inevitable death as painless as possible,'' said the claim filed by celebrity attorney Marvin Mitchelson.

Mitchelson said the separate actions were filed because the claim, not actually a lawsuit, requires 10 days of waiting time before the estate accepts or rejects it.

Meanwhile, Mitchelson filed an actual lawsuit for bodily injury, mental suffering and damages for fraud and deceit against the estate's executor, Hudson's secretary and an unspecified number of doctors.

The suit said Hudson and Christian ''became lovers in March 1983 and thereafter continued a social and sexual relationship with each other.''

''Throughout the said relationship, Hudson professed to plaintiff genuine love for him,'' and Christian in turn trusted him.

However, the suit alleged that when Hudson learned he had AIDS about June 8, 1984, he did not tell Christian and hid the fact from him until July 23, 1985.

The suit said Hudson, 59, who died Oct. 2, told Christian his extreme weight loss was the result of deliberate dieting, exercise and anorexia.

Mitchelson said that Christian has been tested for AIDS and does not know yet whether he has the disease.

There is no known cure for AIDS, a disease that cripples the body's immune system and leaves its victims vulnerable to infections and other diseases, including rare cancers.

Researchers believe AIDS can be spread through sexual contact, contaminated needles and blood transfusions, but not by casual contact. It is is most likely to strike homosexuals, abusers of injectable drugs and hemophiliacs.

A woman who identified herself as a secretary in the New York City office of Wallace Sheft, estate executor, said he was gone for the day today. Dale Olson, who had been Hudson's spokesman, said he would relay a request for comment about the suit to the late actor's secretary, Mark Miller.

Hudson's will, filed early this month, placed no dollar amount on his estate, saying only that it is valued at more than $10,000.

The document left nearly everything Hudson owned to a trust fund he established 11 years ago, deleting all references to the actor's longtime companion, Tom H. Clark.

In an earlier will dated August 1981, Clark was to have received the actor's cars, furniture, motion picture collection and other personal items.

Spokesmen for Hudson, who appeared with Elizabeth Taylor, Doris Day and other top Hollywood stars for almost four decades, acknowledged that he had the deadly disease on July 25, five days after he collapsed at the Ritz Hotel in Paris.

He was hospitalized at the American Hospital in Paris, where he was treated by specialists from the Pasteur Institute, which conducts research into AIDS. He returned to Los Angeles on July 30 and died at his Trousdale Estates mansion.