In:
European Journal of Endocrinology, Oxford University Press (OUP), Vol. 157, No. 3 ( 2007-09), p. 255-263
Abstract:
Background : Gamma knife radiosurgery (GKR) is an adjuvant treatment for acromegaly if surgery fails to normalize GH hypersecretion. Objective : To examine the effect of GKR on tumor growth and hypersecretion, and to characterize the adverse effect of this treatment. Design : Cross-sectional follow-up study. First, retrospective data pre- and post-GKR were collected. Patients then underwent a predefined survey including radiological, endocrinological, ophthalmological, and neurosurgical evaluation. Setting : Norwegian National Center for gamma knife treatment. Patients : Sixty-one patients treated with GKR for acromegaly. Out of 55, 53 living patients underwent a detailed survey. The mean follow-up was 5.5 years. No patient was lost to follow-up. Results : Tumor growth was stopped in all patients. At 3, 5, and 10 years after GKR, 45, 58, and 86% of patients had normal IGF-I levels. Consecutive hormone value analysis showed that patients receiving GH-suppressive medication had a more rapid decline in hypersecretion than those who did not receive such medication. Evaluated by survey baseline values alone, non-elevated IGF-I and GH levels below 5 mIU/l were found in 38%. GH-suppressive medication was terminated in 16 out of 40 patients following GKR. Nine out of 53 surveyed patients (17%) had normal IGF-I and GH nadir below 2.6 mIU/l at glucose tolerance tests, while not on hormone-suppressive medication. Two patients developed minor visual field defects. Eight patients started hormone substitution therapy during the follow-up period. Conclusion : GKR is an effective adjuvant treatment for residual acromegaly, carrying few side effects.
Type of Medium:
Online Resource
ISSN:
0804-4643
,
1479-683X
Language:
Unknown
Publisher:
Oxford University Press (OUP)
Publication Date:
2007
detail.hit.zdb_id:
1485160-X
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