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Establishment and Propagation of Human Retinoblastoma Tumors in Immune Deficient Mice
Published on: August 4, 2011
Aggressive retinal astrocytoma associated with tuberous sclerosis
Machiko Tomida1, Yoshinori Mitamura, Takashi Katome
1Department of Ophthalmology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima.
Clinical Ophthalmology (Auckland, N.Z.)
|June 2, 2012
Summary
Intravitreal bevacizumab showed initial success in treating a patient with aggressive retinal astrocytoma, but ultimately proved insufficient. Further therapies like laser photocoagulation may be necessary for comprehensive tumor management.
Area of Science:
- Ophthalmology
- Oncology
- Vascular Biology
Background:
- Tuberous sclerosis complex (TSC) can present with ocular manifestations, including retinal astrocytomas.
- Aggressive retinal astrocytomas can lead to significant visual impairment due to complications like macular edema and neovascularization.
Observation:
- A 24-year-old male with TSC presented with visual disturbance secondary to an aggressive retinal astrocytoma.
- Initial treatment with intravitreal bevacizumab resulted in regression of macular edema and neovascular vessels.
Findings:
- Despite initial response, the patient developed vitreous hemorrhage necessitating vitrectomy.
- Vascular Endothelial Growth Factor (VEGF) was expressed in the tumor and neovascular membrane, even with undetectable vitreous VEGF levels post-bevacizumab treatment.
- Intravitreal bevacizumab monotherapy was insufficient for complete resolution of the aggressive retinal astrocytoma.
Implications:
- Aggressive retinal astrocytomas may require combination therapy beyond anti-VEGF injections.
- Consideration of adjuvant treatments like laser photocoagulation or photodynamic therapy alongside intravitreal bevacizumab is crucial for managing such complex cases.
- This case highlights the limitations of monotherapy and the need for tailored treatment strategies in managing rare ocular tumors associated with systemic conditions.
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