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Decalcified choroidal osteoma found in the retina  [cached]
Yoshikawa T,Takahashi K
Clinical Ophthalmology , 2012,
Abstract: Tadanobu Yoshikawa, Kanji TakahashiDepartment of Ophthalmology, Kansai Medical University, Hirakata Hospital, Osaka, JapanAbstract: Choroidal osteoma is a benign tumor of the choroid. Herein, we report a rare case of decalcified choroidal osteoma found in the retina. A 27-year-old woman presented with visual loss. Her best-corrected visual acuity was 20/50 OS. Ophthalmoscopy of the left eye revealed a yellow-white calcified region accompanied by a decalcified region of four disc diameters in size. After 6 years, spectral-domain optical coherence tomography showed a tumor projected strongly upwards from the choroid and partially through the retina with serous retinal detachment, with both a lamellar appearance and mound-like area. The calcified region became more contractive than was observed on the first visit. Conversely, the decalcified region was wider than was observed on the first visit. Her best-corrected visual acuity was 20/400 OS. Choroidal osteoma was worsened by progression of decalcification. The decalcified choroidal osteoma resulted in poor visual acuity, and projected strongly upward from the choroid and into the retina.Keywords: osteoma, decalcification, choroidal osteoma
Two Huge Maxillofacial Osteoma Cases Evaluated By Computed Tomography  [cached]
Samira Saati,Nafiseh Nikkerdar,Amin Golshah
Iranian Journal of Radiology , 2011,
Abstract: Osteomas are benign osteogenic neoplasms or hamartomas with a very slow growth rate. Osteoma is the most common mesenchymal neoplasm of the paranasal sinuses. In the jaws, the mandible is more commonly involved than the maxilla. Osteomas may occur at any age, but most frequently are found in individuals older than 40 years. Although most osteomas are small, some may become large enough to cause severe damage, especially those that develop in the frontoethmoid region. Osteomas composed solely of compact bone are uniformly radiopaque and those containing cancellous bone show evidence of internal trabecular structure. To determine and evaluate the exact extension and internal structure of these lesions, computed tomography (CT) is a more useful imaging modality in comparison to conventional radiography. Hereby, we discuss clinical and imaging features of two osteomas (one in the ethmoid sinus and the other in the mandible) along with the main differential diagnoses and pathologic features.
Choroidal osteoma with choroidal neovascular membrane: Successful treatment with intravitreal bevacizumab  [cached]
Neeraj Pandey,Ayachit Guruprasad
Clinical Ophthalmology , 2010,
Abstract: Neeraj Pandey, Ayachit GuruprasadMM Joshi Eye Institute, Hubli, Karnataka, IndiaAbstract: An otherwise healthy 27-year-old woman presented with complaints of sudden painless blurred vision in the right eye for one week. On examination, visual acuity was 20/30 in the right eye and 20/20 in left eye. Fundus examination OS was normal, but OD demonstrated an elevated, opaque, yellowish parapapillary choroidal lesion with grayish membrane associated with minimal subretinal fluid, suggestive of a choroidal neovascular membrane in the center. B-scan ultrasonography revealed findings consistent with a choroidal osteoma. Fundus fluorescein angiography of the right eye revealed a relatively well defined area of hyperfluorescence that increased in size and intensity in the later phases, suggestive of active extrafoveal choroidal neovascular membrane. Optical coherence tomography confirmed the extrafoveal choroidal neovascular membrane with subfoveal fluid. She was treated with intravitreal bevacizumab OD. At the two-week visit, vision OD improved to 20/20. Fluorescein angiography and optical coherence tomography revealed a resolved choroidal neovascular membrane. Intravitreal bevacizumab may be an effective alternative in the management of choroidal neovascular membrane secondary to choroidal osteoma.Keywords: osteoma, choroidal neovascular membrane, optical coherence tomography, bevacizumab
Decalcified choroidal osteoma found in the retina
Yoshikawa T, Takahashi K
Clinical Ophthalmology , 2012, DOI: http://dx.doi.org/10.2147/OPTH.S37952
Abstract: alcified choroidal osteoma found in the retina Case report (1422) Total Article Views Authors: Yoshikawa T, Takahashi K Published Date November 2012 Volume 2012:6 Pages 1823 - 1825 DOI: http://dx.doi.org/10.2147/OPTH.S37952 Received: 10 September 2012 Accepted: 16 October 2012 Published: 02 November 2012 Tadanobu Yoshikawa, Kanji Takahashi Department of Ophthalmology, Kansai Medical University, Hirakata Hospital, Osaka, Japan Abstract: Choroidal osteoma is a benign tumor of the choroid. Herein, we report a rare case of decalcified choroidal osteoma found in the retina. A 27-year-old woman presented with visual loss. Her best-corrected visual acuity was 20/50 OS. Ophthalmoscopy of the left eye revealed a yellow-white calcified region accompanied by a decalcified region of four disc diameters in size. After 6 years, spectral-domain optical coherence tomography showed a tumor projected strongly upwards from the choroid and partially through the retina with serous retinal detachment, with both a lamellar appearance and mound-like area. The calcified region became more contractive than was observed on the first visit. Conversely, the decalcified region was wider than was observed on the first visit. Her best-corrected visual acuity was 20/400 OS. Choroidal osteoma was worsened by progression of decalcification. The decalcified choroidal osteoma resulted in poor visual acuity, and projected strongly upward from the choroid and into the retina.
Choroidal osteoma with choroidal neovascular membrane: Successful treatment with intravitreal bevacizumab
Neeraj Pandey, Ayachit Guruprasad
Clinical Ophthalmology , 2010, DOI: http://dx.doi.org/10.2147/OPTH.S13730
Abstract: roidal osteoma with choroidal neovascular membrane: Successful treatment with intravitreal bevacizumab Case report (4315) Total Article Views Authors: Neeraj Pandey, Ayachit Guruprasad Published Date September 2010 Volume 2010:4 Pages 1081 - 1084 DOI: http://dx.doi.org/10.2147/OPTH.S13730 Neeraj Pandey, Ayachit Guruprasad MM Joshi Eye Institute, Hubli, Karnataka, India Abstract: An otherwise healthy 27-year-old woman presented with complaints of sudden painless blurred vision in the right eye for one week. On examination, visual acuity was 20/30 in the right eye and 20/20 in left eye. Fundus examination OS was normal, but OD demonstrated an elevated, opaque, yellowish parapapillary choroidal lesion with grayish membrane associated with minimal subretinal fluid, suggestive of a choroidal neovascular membrane in the center. B-scan ultrasonography revealed findings consistent with a choroidal osteoma. Fundus fluorescein angiography of the right eye revealed a relatively well defined area of hyperfluorescence that increased in size and intensity in the later phases, suggestive of active extrafoveal choroidal neovascular membrane. Optical coherence tomography confirmed the extrafoveal choroidal neovascular membrane with subfoveal fluid. She was treated with intravitreal bevacizumab OD. At the two-week visit, vision OD improved to 20/20. Fluorescein angiography and optical coherence tomography revealed a resolved choroidal neovascular membrane. Intravitreal bevacizumab may be an effective alternative in the management of choroidal neovascular membrane secondary to choroidal osteoma.
3D SPIRAL COMPUTED TOMOGRAPHY FOR THE DIAGNOSIS OF AN ABDOMINAL TUMOUR  [PDF]
R.C. Tiutiuca,Iuliana Eva
Jurnalul de Chirurgie , 2006,
Abstract: Patients with digestive illnesses requires a full exploration, cases where imagistic assets support (echographic examination, radiological data, computed tomography, magnetic resonance) are very usefully. Computed tomography, in this process, has a special value. The results from axial images are sustained by the informations supplied from three-dimensional reconstruction processes (3D reconstruction) with relevant importance in establishment of diagnosis and therapeutic plan.
Comparison of Adsorbed Skin Dose Received by Patients in Cone Beam Computed Tomography, Spiral and Conventional Computed Tomography Scanninng  [PDF]
Ghazi Khanlou Sani K,Eskandarlou A,Rostampour N,Rahimi A
Journal of Dental Medicine , 2011,
Abstract: Background and Aims: The evaluation of absorbed dose received by patients could give useful information for radiation risk estimation. This study was performed to compare the entrance skin dose received by patients in cone beam computed tomography (CBCT), conventional and spiral computed tomography (CT).Materials and Methods: In this experimental study, 81 calibrated TLD chips were used. the TLD chips were placed on facial, thyroid and end of sternum skin surface in patients referred for CT of the paranasal sinuses(3 TLD chips for each area) to estimate the absorbed dose received by central part of radiation field, thyroid and out of field areas, respectively. The data were analyzed using one-way ANOVA and Tukey tests. Results: The dose delivered to the center of irradiated field was about 0.79±0.09 mGy in CBCT technique compared with 16.31±3.71 and 18.84±4.12 mGy for spiral and conventional CT, respectively. The received dose by the out of field areas was about 54 percent of central area dose. There was statistical significant relationship between the imaging modalities and absorbed dose received by patients (P=0.016). The least absorbed dose was for CBCT and the greatest dose was for conventional CT imaging technique.Conclusion: The dose delivered to central area of irradiated field in conventional and spiral CT imaging modalities was about 24 times greater than of that in CBCT. Also, the highest received dose was for central area of radiated field and the lowest dose was for the out of field areas.
Non-contrast Spiral Computed Tomography in Diagnosis of Acute Appendicitis
M.A. Pakaneh,M.S. Fazeli,H. Ghanaati,A. Kaviani
Iranian Journal of Radiology , 2008,
Abstract: "nBackground/Objective: Approach to patients with acute right lower quadrant pain remains a clinical dilemma. Decreasing the risk of negative appendectomies is one of the major goals surgery units intend to achieve. This study has been conducted to determine the accuracy of non-contrast focused appendiceal computed tomography (CT) in preoperative diagnosis of acute appendicitis."nPatients and Methods: During a period of three months, 50 consecutive adult and adolescent patients who were clinically diagnosed as acute appendicitis were included in this study. Focused non-enhanced appendiceal spiral computed tomography (CT) was performed for all patients, preoperatively. Two radiologists who were unaware of the surgical findings assessed the CT scans."nResults: After the operation and pathologic assessment, eight patients with negative appendectomy were found. The sensitivity of CT was 0.71 and 0.83 according to the interpretations of the first and second radiologists, respectively. Moreover, its specificity was 0.88 and 0.75 according to the first and second radiologists' reports, respectively."nConclusion: In patients with clinically diagnosed acute appendicitis, relying on abdominal CT is not helpful.
Evaluation of the absorbed dose of the thyroid gland in conventional spiral and spiral computed tomography techniques  [cached]
Hamid Badrian,Mahnaz Sheikhi,Atefeh Mirzabagherian,Navid Khalighinejad
Journal of Isfahan Dental School , 2012,
Abstract: Introduction: The use of sophisticated radiographic techniques is absolutely necessary in dentistry. The use of these techniques exposes the sensitive organs of head and neck to x-rays. The aim of the present study was to investigate the absorbed dose of the thyroid gland in conventional spiral and spiral computed tomography techniques. Materials and Methods: In this experimental study, 10 TLD GR-200 circular dosimeters (Thermoluminans Detector) were used in male RANDO-like phantom (head and neck segment, i.e. the first 10 segments) in order to determine the radiation dose absorbed by the thyroid gland. Then spiral computed tomographies were provided from the anterior and posterior regions of the maxilla and mandible along with a lateral Scout view as a guide. Conventional spiral tomographies were prepared from the maxilla, mandible and both jaws with a panoramic radiograph as a guide. Data was analyzed using Kruskal-Wallis and Mann-Whitney tests using SPSS 11.5 (a = 0.05). Results: The highest and lowest thyroid gland absorbed doses were observed with computed tomography of both jaws and conventional spiral tomography of the anterior maxilla, respectively (5.92 ± 0.01 and 0.79 ± 0.01 mSiv). The mean amount of the absorbed dose by the thyroid gland was lower in the conventional spiral tomography compared to computed tomography. The two techniques revealed significant differences in the absorbed doses except for conventional spiral tomography in the posterior and anterior regions of the mandible (p value = 0.276).Conclusion: According to results of the present study, the absorbed dose of the thyroid gland in the conventional spiral tomography in different regions of the jaws was less than CT scan techniques. As a result, it appears the use of conventional spiral tomography is preferred over CT scans in limited regions where three-dimensional and cross-sectional views are required.Key words: Thyroid gland, Film dosimetry, Spiral Computed Tomography.
Long-term success of intravitreal bevacizumab for choroidal neovascularization associated with choroidal osteoma  [cached]
Kubota-Taniai M,Oshitari T,Handa M,Baba T
Clinical Ophthalmology , 2011,
Abstract: Mariko Kubota-Taniai1,2, Toshiyuki Oshitari2, Maya Handa2, Takayuki Baba2, Jiro Yotsukura2, Shuichi Yamamoto21Department of Ophthalmology, National Hospital Organization, Chiba Medical Center, Chiba, Japan; 2Department of Ophthalmology and Visual Science, Chiba University Graduate School of Medicine, Chiba, JapanPurpose: To describe a case of choroidal osteoma with choroidal neovascularization (CNV) that was successfully treated with two intravitreal injections of bevacizumab (IVB).Design and methods: Case report on a 12-year-old Japanese girl who presented with a sudden decrease in vision in her left eye. At the first visit, 2 days after the onset of her symptoms, her visual acuity (VA) in her left eye was 0.2. Ophthalmoscopy showed a hemorrhage of 5 disc diameters under the retinal pigment epithelium and a serous retinal detachment at the posterior pole of the left eye. These findings were confirmed by optical coherence tomography. Fluorescein angiography (FA) and indocyanine green angiography (ICGA) showed several points of leakage around the fovea, which suggested a CNV. From these findings, the patient was diagnosed with choroidal osteoma with a CNV. The submacular hemorrhage was from the CNV associated with the choroidal osteoma. We treated her with two injections of 1.25 mg/0.05 mL IVB with a 4-month interval.Results: The patient's VA in her left eye improved to 0.7, and this vision was maintained for 4 years. The CNV disappeared in the FA and ICGA images and no recurrence was observed after 4 years.Conclusion: Our findings indicate that IVB is effective in resolving CNV in eyes with an osteoma and prevents a decrease of vision in eyes with a choroidal osteoma with a CNV.Keywords: choroidal osteoma, CNV, IVB, visual acuity
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