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Initial Gamma Knife radiosurgery for nonfunctioning pituitary adenomas.

Cheng-Chia Lee1, Hideyuki Kano, Huai-Che Yang

  • 1Department of Neurological Surgery, University of Virginia Health System, Charlottesville, Virginia;

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|January 11, 2014
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Summary
This summary is machine-generated.

Gamma Knife radiosurgery (GKRS) offers effective long-term tumor control for nonfunctioning pituitary adenomas (NFAs), with an 85% success rate at 10 years. This treatment is a safe alternative for elderly patients or those with comorbidities.

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Area of Science:

  • Neurosurgery
  • Radiation Oncology
  • Endocrinology

Background:

  • Nonfunctioning pituitary adenomas (NFAs) are the most common pituitary tumors.
  • Surgical resection is the primary treatment for symptomatic NFAs.
  • Gamma Knife radiosurgery (GKRS) presents an alternative for patients with high surgical risks.

Purpose of the Study:

  • To evaluate the efficacy and safety of initial GKRS for NFAs.
  • To assess long-term tumor control rates and adverse events following GKRS for NFAs.

Main Methods:

  • Retrospective review of data from 569 patients with NFAs across three international Gamma Knife centers.
  • Analysis of outcomes in 41 patients who underwent GKRS as primary management.
  • Median tumor margin dose of 12 Gy was administered.

Main Results:

  • Overall tumor control rate was 92.7%, with actuarial control at 85% by 10 years.
  • New or worsened hypopituitarism occurred in 24% of patients, more frequently with higher radiation doses.
  • One case of new-onset cranial nerve palsy was reported; no other complications.

Conclusions:

  • GKRS provides durable tumor control for NFAs in 85% of patients at 10 years.
  • GKRS is a safe and effective primary treatment option for select NFA patients.
  • This approach is particularly beneficial for elderly patients, those with comorbidities, or those preferring non-invasive treatment.