November 3, 1983

Thomas E. Bolger, an executive vice president and one of A.T.& T.'s nine top executives, could certainly have stayed on when Ma Bell is broken up on Jan. 1. Instead, he specifically chose to run the Bell Atlantic Corporation, which looks to be one of the stronger regional holding companies being spun off. ''The regionals have an opportunity that is fantastic,'' said Mr. Bolger, chairman and chief executive office of Atlantic Bell, in an interview at the company's headquarters here. ''In just my little region, we have 10 million residential phone lines,'' he continued. ''Right now we largely transfer only voices. But if the information age is as real as competent sociologists tell us, and you start imagining the transfers of data by all these people, the business could be immense.''

After a second patient had become infected by an airborne fungus and had died in a new bone marrow transplant unit at a state cancer hospital here, hospital officials asked the state to install special air filtration systems in each of the unit's six rooms. But the request became stalled in the state's Office of General Services. In the next 8 months, 9 more patients out of 29 in the special unit also became infected with the fungus and died, according to interviews with hospital officials and an examination of documents at the hospital and the State Department of Health. After the 11th death last April 2, officials of the hospital, Roswell Park Memorial Institute, closed the unit - a wing of the building - until the new air filtration systems could be installed. The wing remains closed, and the state has just begun to examine what caused the outbreak, the effectiveness of the hospital's response and the operation of the wing's aging ventilation system.

With hostilities on this Caribbean island apparently at an end, United States military officials made it clear today that the army's key role now was guarding checkpoints, patrolling the capital and making house-to-house and car checks for weapons. The officials said 2,300 paratroopers would leave shortly. They added that for the time being, the remaining 2,500 paratroopers of the 82d Airborne Division on Grenada would be deployed around the capital of St. George's as well as in northern parts of the island where snipers remain. ''There's still small, individual bands and elements there,'' Maj. Douglas Frey, public affairs officer for the Airborne Division, said at the Grenada Beach Hotel, a bomb-damaged resort where the military has set up headquarters.

The United Nations General Assembly approved a resolution ''deploring'' the invasion. Page A21. WASHINGTON, Nov. 2 - The Defense Department said tonight that ''hostilities have ceased'' in Grenada and that the withdrawal of the American troops on the island and the return home of the approximately 600 Cuban prisoners would begin shortly. In a two-sentence announcement, the department said that Secretary of Defense Caspar W. Weinberger ''has directed that U.S. forces begin a pullout within a few days.''

The Horse Shows listing in the Sports section on Sunday gave an incorrect telephone number for information on the National Horse Show. The number to call is (212) 736-6314.