scholarly journals Gamma Knife Radiosurgery for Acromegaly

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
John D. Rolston ◽  
Lewis S. Blevins
Keyword(s):  
Side Effects ◽  
Medical Treatment ◽  
Stereotactic Radiosurgery ◽  
Gamma Knife ◽  
Cranial Nerve ◽  
Remission Rate ◽  
Gamma Knife Radiosurgery ◽  
Substantial Proportion ◽  
Disease Remission ◽  
Cranial Nerve Palsies

Acromegaly is debilitating disease occasionally refractory to surgical and medical treatment. Stereotactic radiosurgery, and in particular Gamma Knife surgery (GKS), has proven to be an effective noninvasive adjunct to traditional treatments, leading to disease remission in a substantial proportion of patients. Such remission holds the promise of eliminating the need for expensive medications, along with side effects, as well as sparing patients the damaging sequelae of uncontrolled acromegaly. Numerous studies of radiosurgical treatments for acromegaly have been carried out. These illustrate an overall remission rate over 40%. Morbidity from radiosurgery is infrequent but can include cranial nerve palsies and hypopituitarism. Overall, stereotactic radiosurgery is a promising therapy for patients with acromegaly and deserves further study to refine its role in the treatment of affected patients.

scholarly journals 3D WrapTM Ultra-Widefield Reconstruction in Stereotactic Radiosurgery for Choroidal Melanoma

2019 ◽  
Vol 6 (1) ◽  
pp. 20-24
Author(s):  
Maria Vittoria Cicinelli ◽  
Alessandro Marchese ◽  
Francesco Bandello ◽  
Giulio Maria Modorati
Keyword(s):  
Side Effects ◽  
Stereotactic Radiosurgery ◽  
Gamma Knife ◽  
Gamma Knife Radiosurgery ◽  
Three Dimensional ◽  
Choroidal Melanoma ◽  
Ocular Complications ◽  
Virtual Reconstruction ◽  
Radiation Induced ◽  
Imaging Instrument

Choroidal melanoma (CM) is the most commonly diagnosed primary intraocular malignancy in adults. Gamma knife radiosurgery (GKR) has demonstrated reliable results in the treatment of CM, but it is limited by the risk of radiation-induced ocular complications. To optimize the dose of radiation focused on the tumor, and limit side effects, the eye should be properly immobilized before treatment. A recently released ultra-widefield imaging instrument (Optomap California; Optos, Dunfermline, Scotland, UK) allows for an interactive three-dimensional (3D) virtual reconstruction of the globe, called 3D WrapTM. The authors share their experience with this rapid, reliable, and relatively easy support in planning globe positioning before GKR treatment.

scholarly journals Gamma Knife radiosurgery for hemangioma of the cavernous sinus

2017 ◽  
Vol 126 (5) ◽  
pp. 1498-1505 ◽  
Author(s):  
Cheng-Chia Lee ◽  
Jason P. Sheehan ◽  
Hideyuki Kano ◽  
Berkcan Akpinar ◽  
Roberto Martinez-Alvarez ◽  
...  
Keyword(s):  
Stereotactic Radiosurgery ◽  
Gamma Knife ◽  
Cavernous Sinus ◽  
Cranial Nerve ◽  
Tumor Resection ◽  
Gamma Knife Radiosurgery ◽  
Vascular Tumors ◽  
Tumor Control ◽  
Gradual Improvement ◽  
Cranial Nerve Dysfunction

OBJECTIVECavernous sinus hemangiomas (CSHs) are rare vascular tumors. A direct microsurgical approach usually results in massive hemorrhage and incomplete tumor resection. Although stereotactic radiosurgery (SRS) has emerged as a therapeutic alternative to microsurgery, outcome studies are few. Authors of the present study evaluated the role of SRS for CSH.METHODSAn international multicenter study was conducted to review outcome data in 31 patients with CSH. Eleven patients had initial microsurgery before SRS, and the other 20 patients (64.5%) underwent Gamma Knife SRS as the primary management for their CSH. Median age at the time of radiosurgery was 47 years, and 77.4% of patients had cranial nerve dysfunction before SRS. Patients received a median tumor margin dose of 12.6 Gy (range 12–19 Gy) at a median isodose of 55%.RESULTSTumor regression was confirmed by imaging in all 31 patients, and all patients had greater than 50% reduction in tumor volume at 6 months post-SRS. No patient had delayed tumor growth, new cranial neuropathy, visual function deterioration, adverse radiation effects, or hypopituitarism after SRS. Twenty-four patients had presented with cranial nerve disorders before SRS, and 6 (25%) of them had gradual improvement. Four (66.7%) of the 6 patients with orbital symptoms had symptomatic relief at the last follow-up.CONCLUSIONSStereotactic radiosurgery was effective in reducing the volume of CSH and attaining long-term tumor control in all patients at a median of 40 months. The authors' experience suggests that SRS is a reasonable primary and adjuvant treatment modality for patients in whom a CSH is diagnosed.

Combination of microsurgery and Gamma Knife surgery for the treatment of intracranial chondrosarcomas

2006 ◽  
Vol 105 (Supplement) ◽  
pp. 18-25 ◽  
Author(s):  
Petter Förander ◽  
Tiit Rähn ◽  
Lars Kihlström ◽  
Elfar Ulfarsson ◽  
Tiit Mathiesen
Keyword(s):  
Gamma Knife ◽  
Cranial Nerve ◽  
Residual Tumor ◽  
Local Tumor Control ◽  
Gamma Knife Surgery ◽  
Long Term Results ◽  
Tumor Control ◽  
Low Grade ◽  
Cranial Nerve Palsies ◽  
Tumor Volume Reduction

ObjectIntracranial chondrosarcomas have a high risk of recurrence after surgery. This retrospective study of patients with intracranial chondrosarcoma was conducted to determine the long-term results of microsurgery followed by Gamma Knife surgery (GKS) for residual tumor or recurrence.MethodsThe authors treated nine patients whose median age was 36 years. Seven patients had low-grade chondrosarcomas (LGCSs), whereas mesenchymal chondrosarcomas (MCSs) were diagnosed in two. Radiosurgery was performed in eight patients, whereas one patient declined further surgical intervention and tumor-volume reduction necessary for the GKS.The patients were followed up for 15 to 173 months (median 108 months) after diagnosis and 3 to 166 months (median 88 months) after GKS. Seven patients had residual tumor tissue after microsurgery, and two operations appeared radical. In the two latter cases, tumors recurred after 25 and 45 months. Thus, definite tumor control was not achieved after surgery alone in any patient, whereas the addition of radiosurgery allowed tumor control in all six patients with LGCSs. Two of these patients experienced an initial tumor regrowth after GKS; in both cases the recurrences were outside the prescribed radiation field. The patients underwent repeated GKS, and subsequent tumor control was observed. An MCS was diagnosed in the remaining two patients. Complications after microsurgery included diplopia, facial numbness, and paresis. After GKS, one patient had radiation necrosis, which required microsurgery, and two patients had new cranial nerve palsies.Conclusions Tumor control after microsurgery alone was not achieved in any patient, whereas adjuvant radiosurgery provided local tumor control in six of eight GKS-treated patients. Tumor control was not achieved in the two patients with MCS. Similar to other treatments for intracranial chondrosarcoma, morbidity after micro- and radiosurgical combination therapy was high and included severe cranial nerve palsies.

scholarly journals MLTI-15. A CASE SERIES OF PRE-OPERATIVE GAMMA-KNIFE RADIOSURGERY FOR RESECTABLE BRAIN METASTASES

2019 ◽  
Vol 1 (Supplement_1) ◽  
pp. i17-i17
Author(s):  
Tatsuya Takezaki ◽  
Haruaki Yamamoto ◽  
Naoki Shinojima ◽  
Jun-ichiro Kuroda ◽  
Shigeo Yamashiro ◽  
...  
Keyword(s):  
Brain Metastases ◽  
Stereotactic Radiosurgery ◽  
Gamma Knife ◽  
Systemic Treatment ◽  
Radiation Necrosis ◽  
Gamma Knife Radiosurgery ◽  
Case Series ◽  
Phase 3 ◽  
Optimal Sequence ◽  
Median Margin

Abstract Recent advances in the systemic treatment of various cancers have resulted in longer survival and higher incidence of brain metastases. Phase 3 trials in north America and in Japan have demonstrated that stereotactic radiosurgery will be a standard adjuvant modality following surgery for resectable brain metastases. However, we don’t know the optimal sequence of this combination therapy. We hypothesized that pre-operative stereotactic radiosurgery for resectable brain metastases provides favorable rates of local control, overall survival, leptomeningeal dissemination and symptomatic radiation necrosis. We have experienced 4 cases of resected brain metastases within 1–7 days after Gamma-knife surgery (median margin dose:22Gy) and have been following their clinical course. We will show the repressive cases.

Cranial Nerve Preservation and Outcomes after Stereotactic Radiosurgery for Jugular Foramen Schwannomas

Neurosurgery ◽  
2007 ◽  
Vol 61 (1) ◽  
pp. 76-81 ◽  
Author(s):  
Juan J. Martin ◽  
Douglas Kondziolka ◽  
John C. Flickinger ◽  
David Mathieu ◽  
Ajay Niranjan ◽  
...  
Keyword(s):  
Stereotactic Radiosurgery ◽  
Cranial Nerve ◽  
Gamma Knife Radiosurgery ◽  
Jugular Foramen ◽  
Tumor Control ◽  
Lower Cranial Nerve ◽  
Nerve Preservation ◽  
Cranial Nerve Function ◽  
Cranial Neuropathies ◽  
Cranial Nerve Preservation

Abstract OBJECTIVE Jugular foramen region schwannomas are rare intracranial tumors that usually present with multiple lower cranial nerve deficits. For some patients, complete surgical resection is possible but may be associated with significant morbidity. Stereotactic radiosurgery is a minimally invasive alternative or adjunct to microsurgery for such tumors. We reviewed our clinical and imaging outcomes after patients underwent gamma knife radiosurgery for management of jugular foramen schwannomas. METHODS Thirty-four patients with 35 tumors (one patient had bilateral tumors) underwent radiosurgery between May 1990 and December 2005. Twenty-two patients had previous microsurgical resection and all patients experienced various cranial neuropathies. A median of six isocenters were used. Median marginal and maximum doses were 14 and 28 Gy, respectively. RESULTS None of the patients were lost to evaluation and the mean duration of follow-up was 83 months. Tumors regressed in 17 patients, remained stable in 16, and progressed in two. Five- and 10-year actuarial control rates were 97 and 94%, respectively. Preexisting cranial neuropathies improved in 20% and remained stable in 77% after radiosurgery. One patient worsened. The function of all previous intact nerves was preserved after radiosurgery. CONCLUSION Stereotactic radiosurgery proved to be a safe and effective management for newly diagnosed or residual jugular foramen schwannomas. Long-term tumor control rates and stability or improvement in cranial nerve function was confirmed.

scholarly journals Gamma Knife stereotactic radiosurgery for cavernous sinus meningioma: long-term follow-up in 200 patients

2019 ◽  
Vol 130 (6) ◽  
pp. 1799-1808 ◽  
Author(s):  
Kyung-Jae Park ◽  
Hideyuki Kano ◽  
Aditya Iyer ◽  
Xiaomin Liu ◽  
Daniel A. Tonetti ◽  
...  
Keyword(s):  
Tumor Progression ◽  
Stereotactic Radiosurgery ◽  
Gamma Knife ◽  
Cavernous Sinus ◽  
Gamma Knife Radiosurgery ◽  
Tumor Control ◽  
Cavernous Sinus Meningioma ◽  
Long Term Study

OBJECTIVEThe authors of this study evaluate the long-term outcomes of stereotactic radiosurgery (SRS) for cavernous sinus meningioma (CSM).METHODSThe authors retrospectively assessed treatment outcomes 5–18 years after SRS in 200 patients with CSM. The median patient age was 57 years (range 22–83 years). In total, 120 (60%) patients underwent Gamma Knife SRS as primary management, 46 (23%) for residual tumors, and 34 (17%) for recurrent tumors after one or more surgical procedures. The median tumor target volume was 7.5 cm3 (range 0.1–37.3 cm3), and the median margin dose was 13.0 Gy (range 10–20 Gy).RESULTSTumor volume regressed in 121 (61%) patients, was unchanged in 49 (25%), and increased over time in 30 (15%) during a median imaging follow-up of 101 months. Actuarial tumor control rates at the 5-, 10-, and 15-year follow-ups were 92%, 84%, and 75%, respectively. Of the 120 patients who had undergone SRS as a primary treatment (primary SRS), tumor progression was observed in 14 (11.7%) patients at a median of 48.9 months (range 4.8–120.0 months) after SRS, and actuarial tumor control rates were 98%, 93%, 85%, and 85% at the 1-, 5-, 10-, and 15-year follow-ups post-SRS. A history of tumor progression after microsurgery was an independent predictor of an unfavorable response to radiosurgery (p = 0.009, HR = 4.161, 95% CI 1.438–12.045). Forty-four (26%) of 170 patients who had presented with at least one cranial nerve (CN) deficit improved after SRS. Development of new CN deficits after initial microsurgical resection was an unfavorable factor for improvement after SRS (p = 0.014, HR = 0.169, 95% CI 0.041–0.702). Fifteen (7.5%) patients experienced permanent CN deficits without evidence of tumor progression at a median onset of 9 months (range 2.3–85 months) after SRS. Patients with larger tumor volumes (≥ 10 cm3) were more likely to develop permanent CN complications (p = 0.046, HR = 3.629, 95% CI 1.026–12.838). Three patients (1.5%) developed delayed pituitary dysfunction after SRS.CONCLUSIONSThis long-term study showed that Gamma Knife radiosurgery provided long-term tumor control for most patients with CSM. Patients who underwent SRS for progressive tumors after prior microsurgery had a greater chance of tumor growth than the patients without prior surgery or those with residual tumor treated after microsurgery.

Toxicity of Gamma Knife Radiosurgery May Be Greater in Patients with Lower Cranial Nerve Schwannomas

2016 ◽  
Vol 77 (S 01) ◽  
Author(s):  
Rawee Ruangkanchanasetr ◽  
Michelle Alonso-Basanta ◽  
Suneel Nagda ◽  
Geoffrey Geiger ◽  
James Kolker ◽  
...  
Keyword(s):  
Gamma Knife ◽  
Cranial Nerve ◽  
Gamma Knife Radiosurgery ◽  
Lower Cranial Nerve

scholarly journals The Role and Limitations of Gamma Knife Radiosurgery(Stereotactic Radiosurgery Past, Present and Future)

2008 ◽  
Vol 17 (6) ◽  
pp. 455-460
Author(s):  
Keisuke Maruyama ◽  
Tomoyuki Koga ◽  
Masahiro Shin ◽  
Nobuhito Saito
Keyword(s):  
Stereotactic Radiosurgery ◽  
Gamma Knife ◽  
Gamma Knife Radiosurgery

Stereotactic radiosurgery for dural arteriovenous fistula involving the superior sagittal sinus

2002 ◽  
Vol 97 ◽  
pp. 481-483 ◽  
Author(s):  
Keisuke Maruyama ◽  
Masahiro Shin ◽  
Hiroki Kurita ◽  
Masao Tago ◽  
Takaaki Kirino
Keyword(s):  
Arteriovenous Fistula ◽  
Stereotactic Radiosurgery ◽  
Gamma Knife ◽  
Dural Arteriovenous Fistula ◽  
Superior Sagittal Sinus ◽  
Gamma Knife Radiosurgery ◽  
Content Type ◽  
Sagittal Sinus ◽  
Fine Print

✓The authors present a case of ruptured dural arteriovenous fistula primarily draining into the superior sagittal sinus, which was successfully treated by gamma knife radiosurgery.

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