Journal
JOURNAL OF ENDOCRINOLOGICAL INVESTIGATION
Volume 28, Issue 9, Pages 795-801Publisher
EDITRICE KURTIS S R L
DOI: 10.1007/BF03347568
Keywords
flow cytometry; pituitary adenoma; somatostatin analogs; dopamine agonists; proliferation parameters
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The principal factors involved in pituitary adenoma formation are unknown. DNA flow cytometry is a useful study providing an estimation of a tumor proliferative rate. In this study, DNA-flow cytometry was performed to evaluate its capability to both assess prognosis and predict recurrence. Two hundred and seven fresh pituitary adenoma specimens were assessed by flow cytometry. Pre-operative endocrine function, previous medical treatment, radiographic appearance, surgical findings and immunohistochemistry were recorded for each patient. Patient outcomes were assessed at a mean follow-up of 5.3 +/- 3.1 yr. Endocrinologically inactive pituitary adenomas were predominantly euploids (50.8%). The highest proliferation rates occurred in Nelson's syndrome and the lowest in Cushing's disease. A significant difference in proliferation was observed with prolactinomas and acromegaly when a medical treatment was performed before primary surgery. Massive histological invasiveness was directly associated with a significant increase in proliferation rate. Radiotherapy did not affect the recurrence rate (4.4%) statistically. In conclusion, DNA-flow cytometry was found to be useful for determining ploidy and obtaining an overview of cell cycle status. It was helpful in identifying patients requiring closer follow-up, such as those with invasive adenomas and Nelson's syndrome. No single parameter revealed by DNA-flow cytometry could predict tumor prognosis or recurrence in the follow-up of 7.5 +/- 1.3 yr.
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