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Journal of Clinical Endocrinology & Metabolism, Vol 61, 1185-1189, Copyright © 1985 by Endocrine Society

ARTICLES

Acromegaly: biochemical assessment of cure after long term follow-up of transsphenoidal selective adenomectomy

O Serri, M Somma, R Comtois, E Rasio, H Beauregard, N Jilwan and J Hardy

This study reports the clinical and biological follow-up 5-11 yr after transsphenoidal selective adenomectomy in 25 patients with acromegaly. Eight patients had microadenomas, and 17 had macroadenomas. Initial normalization of plasma GH levels (basal values, less than 5 ng/ml; glucose-suppressed concentrations, less than 2.5 ng/ml) was achieved in all 8 patients with microadenomas and in 13 patients with macroadenomas. Of these, 3 patients with normal GH levels and dynamics had relapse of GH hypersecretion after intervals between 1-6 yr after microadenoma removal. Recurrence of pituitary adenoma was documented by surgery in 1 patient and by computed tomographic scanning in 2 others. Normal basal and glucose-suppressed plasma GH concentrations were maintained 7.4 +/- 0.5 (+/- SEM) yr after adenomectomy in 7 patients with microadenomas and in all 10 patients with macroadenomas. Thus, 88% of the patients with microadenomas and 59% of the patients with macroadenomas were cured, and the overall cure rate was 68%. We conclude that recurrence of acromegaly after successful surgery may occur late after adenoma removal and that it cannot be predicted by normal postoperative GH levels and dynamics. However, in view of the overall cure rate, transsphenoidal adenomectomy remains a most valuable treatment for acromegaly.


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