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https://www.readbyqxmd.com/read/28868282/growth-of-uveal-melanoma-following-intravitreal-bevacizumab
#1
Jasmine H Francis, Jonathan Kim, Amy Lin, Robert Folberg, Saipriya Iyer, David H Abramson
PURPOSE: Typically treatment of large melanomas (by Collaborative Ocular Melanoma Study criteria) is restricted to enucleation, due to size constraints for plaque brachytherapy. Because primary and metastatic uveal melanoma cells are inhibited by bevacizumab (an anti-vascular endothelial growth factor), this prospective study evaluated the impact of intravitreal bevacizumab on large uveal melanomas that were destined for enucleation. Size reduction by bevacizumab would potentially salvage these eyes by making them eligible for treatment with plaque brachytherapy...
July 2017: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/28834816/donor-derived-conjunctival-limbal-melanoma-after-a-keratolimbal-allograft
#2
Lorena Sepsakos, Albert Y Cheung, Jeffrey A Nerad, Gautham Mogilishetty, Edward J Holland
PURPOSE: To report a single case of donor-derived conjunctival-limbal melanoma that occurred after a keratolimbal allograft (KLAL). METHODS: Case report and literature review. RESULTS: A 56-year-old white woman with a history of bilateral limbal stem cell deficiency developed a donor-related melanoma after a KLAL. Three months after undergoing an uncomplicated KLAL, the patient presented with hemorrhagic nodules within her conjunctiva and transplanted tissue...
August 22, 2017: Cornea
https://www.readbyqxmd.com/read/28818442/mri-based-treatment-planning-and-dose-delivery-verification-for-intraocular-melanoma-brachytherapy
#3
Jacqueline Esthappan Zoberi, Jose Garcia-Ramirez, Samantha Hedrick, Vivian Rodriguez, Carol G Bertelsman, Stacie Mackey, Yanle Hu, H Michael Gach, P Kumar Rao, Perry W Grigsby
PURPOSE: Episcleral plaque brachytherapy (EPB) planning is conventionally based on approximations of the implant geometry with no volumetric imaging following plaque implantation. We have developed an MRI-based technique for EPB treatment planning and dose delivery verification based on the actual patient-specific geometry. METHODS AND MATERIALS: MR images of 6 patients, prescribed 85 Gy over 96 hours from Collaborative Ocular Melanoma Study-based EPB, were acquired before and after implantation...
August 14, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28685998/iridociliary-cysts-masquerading-as-neoplasia-in-cats-a-morphologic-review-of-14-cases
#4
Jessica A Fragola, Richard R Dubielzig, Ellison Bentley, Leandro B C Teixeira
OBJECTIVE: To report 14 neoplasia-free feline eyes enucleated for suspected intraocular neoplasia containing only iridociliary cysts. To analyze clinical findings that may have led veterinarians to suspect neoplasia in these globes. PROCEDURES: The archives at the Comparative Ocular Pathology Laboratory of Wisconsin (COPLOW) were searched to identify neoplasia-free feline globes enucleated for suspected neoplasia. Clinical data were obtained from medical records, veterinarian surveys, and COPLOW submission forms...
July 6, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28626853/conjunctival-melanoma-in-southwestern-nigeria-a-case-series-and-review-of-literature
#5
Oluyemi Fasina, Olayiwola A Oluwasola
PURPOSE: Conjunctival melanoma is a rare tumor worldwide and is extremely rare among black population. This study aims to report the demographics, clinical presentation, treatment, and outcome of patients seen in an indigenous black population in Southwestern Nigeria. METHODS: All patients histologically diagnosed with conjunctival melanoma and managed in the facility were reviewed. Their demographics, clinical presentation, treatment received, outcome of treatment, and histopathological features were analyzed...
June 19, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28595565/gold-nanoparticles-by-laser-ablation-for-x-ray-imaging-and-protontherapy-improvements
#6
Torrisi Lorenzo, Nancy Restuccia, Irene Paterniti
Gold nanoparticles, 5-20 nm in diameter, were generated with a pulsed Nd:YAG laser at 1010 W/cm2 at solution concentrations ranging between 1-100 mg/ml. Nanoparticles were characterized using optical absorbance, X-ray fluorescence, SEM, and TEM. Biocompatible nanoparticle solutions were injected by intravenously into the tail veins of mice followed by X-ray imaging using 20-45 keV photons to evaluate the uptake and the clearance by different organs of the nanoparticles. The incremental X-ray contrast imaging using gold nanoparticles was investigated and measured...
June 8, 2017: Recent Patents on Nanotechnology
https://www.readbyqxmd.com/read/28586956/stereotactic-radiosurgery-and-fractionated-stereotactic-radiation-therapy-for-the-treatment-of-uveal-melanoma
#7
Gozde Yazici, Hayyam Kiratli, Gokhan Ozyigit, Sezin Yuce Sari, Mustafa Cengiz, Bercin Tarlan, Burce Ozgen Mocan, Faruk Zorlu
PURPOSE: To evaluate treatment results of stereotactic radiosurgery or fractionated stereotactic radiation therapy (SRS/FSRT) for uveal melanoma. METHODS AND MATERIALS: We retrospectively evaluated 181 patients with 182 uveal melanomas receiving SRS/FSRT between 2007 and 2013. Treatment was administered with CyberKnife. RESULTS: According to Collaborative Ocular Melanoma Study criteria, tumor size was small in 1%, medium in 49.5%, and large in 49...
May 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28586953/dry-eye-syndrome-after-proton-therapy-of-ocular-melanomas
#8
Juliette Thariat, Celia Maschi, Sara Lanteri, Marie Laure Peyrichon, Stephanie Baillif, Joel Herault, Julia Salleron, Jean Pierre Caujolle
PURPOSE: To investigate whether proton therapy (PT) performs safely in superotemporal melanomas, in terms of risk of dry-eye syndrome (DES). METHODS AND MATERIALS: Tumor location, DES grade, and dose to ocular structures were analyzed in patients undergoing PT (2005-2015) with 52 Gy (prescribed dose, not accounting for biologic effectiveness correction of 1.1). Prognostic factors of DES and severe DES (sDES, grades 2-3) were determined with Cox proportional hazard models...
May 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28572063/pattern-of-local-recurrence-after-i-125-episcleral-brachytherapy-for-uveal-melanoma-in-a-spanish-referral-ocular-oncology-unit
#9
Sara Sánchez-Tabernero, Ciro García-Alvarez, Ma Fe Muñoz-Moreno, Patricia Diezhandino, Pilar Alonso-Martínez, Jesus M de Frutos-Baraja, Francisco López-Lara, Maria A Saornil
PURPOSE: To describe the time, frequency, and clinical characteristics of treatment failure after I-125 brachytherapy in patients with uveal melanoma treated and followed in a Spanish referral ocular oncology unit. DESIGN: Prospective, consecutive, interventional case series. METHODS: Patients diagnosed with uveal melanoma from 1995 to 2016 and treated with episcleral brachytherapy were included. Demographic data collection, ophthalmic evaluation, ultrasound scan, and systemic studies were performed at baseline, every 6 months thereafter for 5 years, and subsequently at annual intervals...
August 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28541267/choroidal-melanoma-sector-melanocytosis-and-retinal-pigment-epithelial-microdetachments-in-birt-hogg-dub%C3%A3-syndrome
#10
Charlotte L Marous, Molly R Marous, R Joel Welch, Jerry A Shields, Carol L Shields
PURPOSE: Birt-Hogg-Dubé Syndrome (BHDS) is a rare autosomal dominant condition that can predispose patients to numerous cutaneous fibrofolliculomas and other cutaneous lesions, pulmonary cysts with spontaneous pneumothorax, and multifocal renal tumors and cancer. The genetic mutations responsible for BHDS are related to tumor suppression and the mammalian target of rapamycin (mTOR) pathway. Previous reports of the ocular findings in BHDS include eyelid fibrofolliculomas, "flecked chorioretinopathy," and one report of choroidal melanoma...
May 22, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28505674/-novel-adjuvant-therapy-for-ocular-melanoma
#11
Jacobus J Bosch, Ludwig M Heindl
Background Malignant melanoma is the most common cancer of the eye in adults that originates either in the intra-ocular uveal tract or extra-ocular conjunctiva. Although the primary tumor can be treated successfully, no effective therapy for both metastatic conjunctival and uveal melanoma currently exits. Tumor-associated lymphangiogenesis and immune cell infiltration play a pivotal role in the development and therapeutic targeting of metastases. Project description Here, we provide an overview of current translational research on lymphangiogenesis and its therapeutic inhibition as well as modulation of immune cell infiltration by passive and active immunotherapy in melanoma of the eye...
May 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28377140/early-outcomes-of-uveal-melanoma-treated-with-intraoperative-ultrasound-guided-brachytherapy-using-custom-built-plaques
#12
Anne W Tann, Bin S Teh, Sarah B Scarboro, Gary D Lewis, Maria E Bretana, Porshea C Croft, Yuval Raizen, E Brian Butler, Ryan S Kim, Patricia Chevez-Barrios, Amy C Schefler
PURPOSE: To report early outcomes of patients with uveal melanoma treated with Eye Physics iodine-125 episcleral plaque therapy using modern biopsy techniques and intraoperative ultrasound guidance at our institution. METHODS AND MATERIALS: A retrospective chart review was conducted for 48 consecutive patients with uveal melanoma who were treated with Eye Physics plaque brachytherapy performed by 1 ocular oncologist. All patients underwent intraoperative ultrasound for image guidance of plaque placement...
January 7, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28350816/multi-channel-mri-segmentation-of-eye-structures-and-tumors-using-patient-specific-features
#13
Carlos Ciller, Sandro De Zanet, Konstantinos Kamnitsas, Philippe Maeder, Ben Glocker, Francis L Munier, Daniel Rueckert, Jean-Philippe Thiran, Meritxell Bach Cuadra, Raphael Sznitman
Retinoblastoma and uveal melanoma are fast spreading eye tumors usually diagnosed by using 2D Fundus Image Photography (Fundus) and 2D Ultrasound (US). Diagnosis and treatment planning of such diseases often require additional complementary imaging to confirm the tumor extend via 3D Magnetic Resonance Imaging (MRI). In this context, having automatic segmentations to estimate the size and the distribution of the pathological tissue would be advantageous towards tumor characterization. Until now, the alternative has been the manual delineation of eye structures, a rather time consuming and error-prone task, to be conducted in multiple MRI sequences simultaneously...
2017: PloS One
https://www.readbyqxmd.com/read/28297329/ocular-brachytherapy-dosimetry-for-103pd-and-125i-in-the-presence-of-gold-nanoparticles-a-monte-carlo-study
#14
Somayeh Asadi, Mehdi Vaez-Zadeh, Mohammad Vahidian, Mahdieh Marghchouei, S Farhad Masoudi
The aim of the present Monte Carlo study is to evaluate the variation of energy deposition in healthy tissues in the human eye which is irradiated by brachytherapy sources in comparison with the resultant dose increase in the gold nanoparticle (GNP)-loaded choroidal melanoma. The effects of these nanoparticles on normal tissues are compared between 103Pd and 125I as two ophthalmic brachytherapy sources. Dose distribution in the tumor and healthy tissues has been taken into account for both brachytherapy sources...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28161431/dosimetric-and-radiobiologic-comparison-of-103-pd-coms-plaque-brachytherapy-and-gamma-knife-radiosurgery-for-choroidal-melanoma
#15
COMPARATIVE STUDY
Daniel Gorovets, Nolan L Gagne, Christopher S Melhus
PURPOSE: Plaque brachytherapy (BT) and Gamma Knife radiosurgery (GKRS) are highly conformal treatment options for choroidal melanoma. This study objectively compares physical dose and biologically effective dose (BED) distributions for these two modalities. METHODS AND MATERIALS: Tumor and organ-at-risk (OAR) dose distributions from a CT-defined reference right eye were compared between (103)Pd COMS (Collaborative Ocular Melanoma Study Group) plaques delivering 70 Gy (plaque heterogeneity corrected) over 120 h to the tumor apex and GKRS plans delivering 22 Gy to the 40% isodose line for a representative sample of clinically relevant choroidal melanoma locations and sizes...
March 2017: Brachytherapy
https://www.readbyqxmd.com/read/28126270/evisceration-and-ocular-tumors-what-are-the-consequences
#16
S Lemaître, A Lecler, C Lévy-Gabriel, C Reyes, L Desjardins, D Gentien, M Zmuda, P V Jacomet, L Lumbroso-Le Rouic, R Dendale, A Vincent-Salomon, G Pierron, O Galatoire, N Cassoux
PURPOSE: Evisceration can be performed for blind, painful eyes. This surgery can promote the dissemination of tumor cells within the orbit if an ocular tumor has been missed preoperatively. METHODS: We reviewed the medical records of patients who were eviscerated for blind, painful eyes between 2009 and 2014 and who were referred after the surgery to the Institut Curie or the Rothschild Foundation in Paris. We included the patients with a histological diagnosis of ocular tumor or orbital recurrence...
February 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28047428/su-f-t-48-clinical-implementation-of-brachytherapy-planning-system-for-coms-eye-plaques
#17
C Ferreira, M Islam, S Ahmad, T De La Fuente Herman
PURPOSE: To commission the Brachytherapy Planning (BP) system (Varian, Palo Alto, CA) for the Collaborative Ocular Melanoma Study (COMS) eye plaques by evaluating dose differences against original plans from Nucletron Planning System (NPS). METHODS: NPS system is the primary planning software for COMS-plaques at our facility; however, Brachytherapy Planning 11.0.47 (Varian Medical Systems) is used for secondary check and for seed placement configurations not originally commissioned...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27911450/uveal-melanoma-relatively-rare-but-deadly-cancer
#18
REVIEW
S Kaliki, C L Shields
Although it is a relatively rare disease, primarily found in the Caucasian population, uveal melanoma is the most common primary intraocular tumor in adults with a mean age-adjusted incidence of 5.1 cases per million per year. Tumors are located either in iris (4%), ciliary body (6%), or choroid (90%). The host susceptibility factors for uveal melanoma include fair skin, light eye color, inability to tan, ocular or oculodermal melanocytosis, cutaneous or iris or choroidal nevus, and BRCA1-associated protein 1 mutation...
February 2017: Eye
https://www.readbyqxmd.com/read/27903184/microinvasive-tumor-endoresection-in-combination-with-ocular-stereotactic-radiosurgery
#19
Oleg A Sinyavskiy, Roman L Troyanovsky, Pavel I Ivanov, Alexandr S Golovin, Andrey V Tibilov, Svetlana N Solonina, Anna M Astapenko, Irina S Zubatkina
OBJECTIVE The use of Gamma Knife radiosurgery (GKRS) as monotherapy in the treatment of uveal melanoma (UM) allows clinicians to achieve high local tumor control with low recurrence but does not prevent secondary enucleation due to glaucoma in cases of large tumors. The authors analyzed indications for tumor endoresection (ER), the time interval between irradiation and surgery, and the features and results of performing ER for UM after GKRS. METHODS Thirty-seven patients between 28 and 78 years of age (16 male and 11 female patients) with UM underwent GKRS with a dose of 70 to 80 Gy that was applied to the center of the tumor with complete immobilization of the eye during the procedure...
December 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27851881/magnetic-resonance-safety-and-compatibility-of-tantalum-markers-used-in-proton-beam-therapy-for-intraocular-tumors-a-7-0-tesla-study
#20
Eva Oberacker, Katharina Paul, Till Huelnhagen, Celal Oezerdem, Lukas Winter, Andreas Pohlmann, Laura Boehmert, Oliver Stachs, Jens Heufelder, Andreas Weber, Matus Rehak, Ira Seibel, Thoralf Niendorf
PURPOSE: Proton radiation therapy (PRT) is a standard treatment of uveal melanoma. PRT patients undergo implantation of ocular tantalum markers (OTMs) for treatment planning. Ultra-high-field MRI is a promising technique for 3D tumor visualization and PRT planning. This work examines MR safety and compatibility of OTMs at 7.0 Tesla. METHODS: MR safety assessment included deflection angle measurements (DAMs), electromagnetic field (EMF) simulations for specific absorption rate (SAR) estimation, and temperature simulations for examining radiofrequency heating using a bow-tie dipole antenna for transmission...
November 10, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
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