It has been reported in autopsy that most of the patients with Korean hemorrhagic fever had necrotic areas in the anterior lobe of the pituitary gland. The high resolution CT of sella was performed to demonstrate the possible pituitary necrosis in consecutive 13 patients with Korean hemorrhagic fever. Only 3 patients demonstrate normal sellar findings. Ten (77%) out of 13 cases reveal abnormal findings; 2 patients show typical empty sella and the rest (8 patients) reveal localized low density area in the anterior portion of the sella turcica, which may be from partial empty sella, pituitary infarction or other unknown pathology. The low densities within the sella will be discussed.