Related Experiment Videos
Changes in the immunophenotype of recurrent pituitary adenomas
T Mindermann1, K Kovacs, C B Wilson
1Department of Neurological Surgery, School of Medicine, University of California, San Francisco.
Neurosurgery
|July 1, 1994
Summary
Pituitary adenomas can change phenotype between initial resection and recurrence. This study found 7.7% of recurrent pituitary tumors exhibited such aggressive changes, necessitating further investigation.
Area of Science:
- Endocrinology
- Neurosurgery
- Oncology
Background:
- Pituitary adenomas are common tumors, but phenotypic changes between recurrence and initial resection are rarely reported.
- Understanding these changes is crucial for effective patient management and treatment strategies.
Purpose of the Study:
- To determine the frequency of pituitary adenomas changing phenotype between initial resection and recurrence.
- To characterize the clinical course and patterns associated with these phenotypic changes.
Main Methods:
- Retrospective chart review of 1023 patients with pituitary adenomas who underwent surgery between 1984 and 1992.
- Analysis of clinical data for patients with tumor recurrence, focusing on changes in hormone production and release.
Main Results:
- 6.4% of patients experienced tumor recurrence.
- Of recurrent tumors, 7.7% showed a phenotypic change.
- These aggressive tumors were often invasive macroadenomas, occurring after an average of 6.4 years, and associated with pituitary apoplexy in some cases.
Conclusions:
- Phenotypic changes in recurrent pituitary adenomas appear to be associated with aggressive tumor behavior.
- Further research is needed to understand the treatment implications of these changes.
- Complete immunostaining of primary and recurrent tumors is recommended for data collection.