Nepal ? A woman who became seriously ill while in Mount Everest’s so-called “death zone” and was helped down by fellow climbers has safely reached base camp, Nepalese mountaineering officials said Friday.

Uma Bista of Nepal was “barely coherent” and suffering from cerebral edema, or swelling of the brain, when she was found Monday near 27,225 feet, said veteran climber Dave Hahn of Taos, N.M.

In Internet dispatches, Hahn said he and other climbers in his group were descending from the summit of the 29,035-foot mountain when they came across Bista.

He and the others managed to carry Bista in a litter to a lower camp at 23,950 feet and handed her over to a British team, which is on the mountain on a medical research mission.

On Wednesday, aided by five Sherpas, she managed to descend the treacherous Lhotse face, a wall of glacial ice, he said.