A member from Norway experienced dizziness headache visual disturbance fatigue and insomnia after ascending from Everest Base Camp at 17,598 feet/5,364 meters to Gorak Shep at 16,929 feet/5,160 meters and Lobuche at 16,174 feet/4,930 meters. He was advised to descend but worsened with diarrhea poor intake and oxygen saturation of 78 percent. He was evacuated to a medical center where he was diagnosed with mild high altitude cerebral edema and viral bronchitis treated and discharged.