Fractionated stereotactic radiation therapy for orbital optic nerve sheath meningioma - a single institution experience and a short review of the literature
Fractionated stereotactic radiation therapy for orbital optic nerve sheath meningioma - a single institution experience and a short review of the literature(116 visite) Pacelli R, Cella L, Conson M, Tranfa F, Strianese D, Liuzzi R, Solla R, Farella A, Salvatore M, Bonavolonta G
J Rad Res Journal Of Radiation Research (ISSN: 1349-9157electronic, 0449-3060linking), 2011; 52(1): 82-87.
Tipo di articolo: Journal Article,
Impact factor: 1.683, Impact factor a 5 anni: 1.794
*** IBB - CNR *** Department of Diagnostic Imaging and Radiation Oncology, Federico II University School of Medicine, Naples, Italy. Roberto.pacelli@cnr.it,
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Optic nerve sheath meningioma (ONSM) is a rare orbital tumor that generally induces a slow progressive visual loss in affected patients. Radiotherapy (RT) has currently become the first choice to treat ONSM. In this study our experience in ONSM treatment with fractionated stereotactic radiotherapy (FSRT) is reported. Five patients with diagnosis of orbital ONSM were treated between April 2007 and December 2009 at the Radiation Oncology department of our institution. All patients underwent history and physical, and ophthalmic examinations. Orbital MRI was performed before and 6 weeks after treatment; thereafter every 6 months for the first 2 years. By previous stereotactic localization of the target, RT was delivered with 28 daily fraction of 1.8 Gy by multiple non coplanar arcs dynamically conformed by a micro multileaf-collimator. At diagnosis, in all 5 patients, visual acuity limitations of different degrees were found, while exophthalmos was present in 2, diplopy in 2, orbital pain in 1, and proptosis in 1. In all patients pre-treatment MRI showed an orbital mass involving the optic nerve. After radiotherapy, previous symptoms improved in all patients. However, after RT the MRI consistently showed a stationary status compared to the MRI before RT. At a median follow up of 26 months (range 9-37) all patients had a subjective and/or objective better visual performance than before RT without any evidence of disease progression. No late side effects were recorded. Accordingly to the current literature, our experience confirms the efficacy and the safety of FSRT in patients with orbital ONSM.
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619 Records (577 escludendo Abstract e Conferenze). Impact factor totale: 1866.436 (1765.149 escludendo Abstract e Conferenze). Impact factor a 5 anni totale: 2031.039 (1899.525 escludendo Abstract e Conferenze).
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