At what elevation is HACE rarely reported?

High Altitude Cerebral Edema (HACE) is a serious condition that can occur in individuals exposed to high elevations. Its occurrence is significantly associated with elevations above 10,000 feet. At elevations lower than this, particularly around 8,000 feet, the body typically can acclimatize more effectively, and cases of HACE become increasingly rare.

By the time the elevation reaches around 12,000 feet, the risk of developing HACE increases, especially if rapid ascents are made without proper acclimatization. The pathophysiology involves fluid accumulation in the brain due to reduced barometric pressure and decreased availability of oxygen, which is less pronounced at lower elevations.

Thus, the correct elevation at which HACE is rarely reported would be around 10,000 feet, as conditions at this altitude still allow for a reasonable level of acclimatization in most individuals, reducing the likelihood of developing this severe altitude illness.