Hemangiopericytomas

Solitary fibrous tumors and hemangiopericytomas are more rare intracranial tumors.  They often mimic meningiomas in terms of their appearance. However, they typically exhibit a more aggressive course.

The rare tumor types have been shown to be amenable to Gamma Knife radiosurgery. 

In a recent study in BMJ case report, Gamma Knife radiosurgery was used to successful treat a solitary fibrous tumor of the orbit.  The patient has had a favorable radiological and clinical response to date.

In a multicenter study lead by Dr. Sheehan at UVA, the International GK Research Foundation published results of Gamma Knife radiosurgery for hemangiopericytoma patients in the Journal of Neurosurgery in 2017.  The largest study of its kind showed a reasonable rate of local tumor control and a low risk of adverse effects. It also leads to neurological stability or improvement in the majority of patients. Long-term close clinical and imaging follow-up is necessary due to the high probability of local recurrence and distant metastases. Repeat GK radiosurgery S is often effective for treating new or recurrent HPCs.