[Basal cortisol and ACTH in the immediate postoperative period in ACTH-producing hypophyseal adenomas].
1993
BACKGROUND: Evaluate the usefulness of basal cortisol and ACTH during the immediate postoperative period following hypophyseal surgery, as early indicators of remission in patients with Cushing's disease. METHODS: Nine patients with Cushing's disease and on whom selective transphenoidal adenomectomy was performed were included in the study. Basal cortisol and ACTH levels were compared the first week after surgery, with definitive results being obtained after a month's time during which basal cortisol levels below 165 nmol/l indicated patients cured of Cushing's disease. RESULTS: Cortisol levels determined post-op, in five patients in remission, were found to be lower than those in patients who were not cured (63 +/- 55.8 versus 606 +/- 267 nmol/l, p < 0.01). However, ACTH levels were not lower. All the patients in remission had initial cortisol levels lower than 182 nmol/l, whereas the uncured patients had levels higher than 404 nmol/l. There was a correlation between cortisol measured in the first week and the definitive value (r = 0.81, p < 0.01). CONCLUSION: Cortisol in the immediate postoperative period following hypophyseal surgery is a good indicator of definitive adrenocorticotropic function and permits the identification of those patients in remission.
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