The summary was as follows; 1. Among 16 cases, chromophobe adenoma are 12 cases, eosinophilic one is 1 case and unknown cell type cystic ones are 3 cases, histologically. 2. Most frequent chief complaints are insidious onset visual impairment, headache and loss of libido andj or amenorrhea in decreasing order. 3. The plain skulls reveal typical ballooning and cup shape enlargement of sella, among them, there are marked destroyed sella changes in 3 cases. Double contour of sella are present in 3

more »

... cases. There is no definite calcification, osteoblastic change around sella neither typical acrom-ega1ic skull. 4. The carotid angiograms, which was performed in 14 cases, show typical lateral displacement of intracaverno us , a nd supraclinoid portion of internal carotid artery and opening of carotid siphon in 10 case. And elevation of proximal portion of anterior and middle cerebral artery are evident. There is no evidence of tumor brush. 5. Th e fractional pneumoencephalograms of 9 cases show the large tumor mass in chiasmatic cister n in a ll cases. These conventional studies could be helpful in the diagnosis of sella tumor, especially pituitary adenoma , however, authors are r ecommended for further radiologic study such as autotomogram during pneumoencephalogram or cavernous sinus angiogram for better differential dianosis.