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Gamma Knife Radiosurgery for Third Ventricular Colloid Cysts: A Retrospective Study
Amr M N El-Shehaby1,2, Wael A Reda1,2, Khaled M Abdel Karim1,3
1Gamma Knife Center Cairo, Nasser Institute For Research and Treatment, Cairo, Egypt.
Stereotactic and Functional Neurosurgery
|January 7, 2024
Summary
Gamma Knife (GK) radiosurgery offers a safe and effective noninvasive treatment for third ventricular colloid cysts, achieving 100% cyst control in a recent study. This promising option provides an alternative to traditional surgical interventions for these benign brain lesions.
Area of Science:
- Neurosurgery
- Radiation Oncology
- Neurology
Background:
- Third ventricular colloid cysts are benign, slow-growing lesions.
- Symptoms include intracranial hypertension and rarely sudden death due to hydrocephalus.
- Management options include shunting, surgical excision, and stereotactic aspiration, each with associated risks.
Purpose of the Study:
- To evaluate the efficacy and safety of Gamma Knife (GK) radiosurgery for treating third ventricular colloid cysts.
- To establish GK radiosurgery as a viable noninvasive treatment option.
Main Methods:
- Retrospective study of 13 patients with third ventricular colloid cysts treated with GK radiosurgery.
- GK radiosurgery was the primary treatment modality.
- Median prescription dose of 12 Gy, with cyst volumes ranging from 0.2 to 10 cc.
Main Results:
- Median follow-up of 50 months.
- 100% cyst control was achieved.
- 92% of patients showed complete or partial response; 62% initially had hydrocephalus, with most requiring shunt insertion before or after GK treatment.
Conclusions:
- Gamma Knife radiosurgery is a promising and safe treatment for third ventricular colloid cysts.
- It represents a valuable addition to existing treatment modalities.
- Longer follow-up is necessary to confirm sustained long-term efficacy.
