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Dexamethasone is the corticosteroid most commonly used for the management of vasogenic edema in patients with brain tumors. The occurrence of hyperglycemia following corticosteroid administration is well known to physicians and health care givers. The purpose of the study is to investigate late onset of hyperglycemia and associated factors in patients with brain tumors. The inclusion criteria are as follows; 1) brain tumor patients underwent craniotomy; 2) steroid administered for at least 3 days longer perioperatively or postoperatively; 3) serum glucose levels examined for at least 3 months postoperatively The exclusion criteria are as follows; 1) steroid administered for less than 3 days; 2) patients diagnosed with type 1 diabetes, renal failure, hepatic failure or autoimmune diseases; 3) other medical illness treated with corticosteroid. A total of 101 patients were enrolled for the analysis. Fasting blood glucose of diabetes patients and non-diabetes patients was 160±93 mg/dl and 114±43 mg/dl, respectively. There was no difference of type of brain tumors, body mass index, hypertension, smoking history, hyperlipidemia, GOT, GPT, ESR, CRP, and Cr between diabetes patients and non-diabetes patients. The peak of Fasting blood glucose was noted on day 1 postoperatively in non-diabetes patients. Two peak of Fasting glucose levels were found on day 1 and 6 postoperatively in diabetes patients. Late hyperglycemia was determined as in patients with fasting blood glucose of &gt;125 mg/dl during 3~6 months postoperatively. Fifteen patients out of 86 non-diabetes patients developed late hyperglycemia. There were significant differences of duration and total dose of dexamethasone administration between late hyperglycemia patients and non-late hyperglycemia patients. Steroid-induced hyperglycemia can develop late postoperatively even in non-diabetic patients with brain tumor treated with dexamethasone. Fasting blood glucose during the first week postoperatively can predict late hyperglycemia. Duration and total dosage of dexamethasone administered are associated with late hyperglycemia.

NCMP-01. RISK FACTORS ASSOCIATED WITH LATE HYPERGLYCEMIA IN BRAIN TUMOR PATIENTS WITH POSTOPERATIVE ADMINISTRATION OF DEXAMETHASONE