Persistent hyperplastic primary vitreous and von Hippel-Lindau disease - Contribution of color Doppler ultrasonography

Persistent hyperplastic primary vitreous (PHPV) is a rare benign developmental disorder of the globe in which the embryonic hyaloid artery fails to regress normally, resulting in abnormal lenticular development and secondary changes of the retina and globe.(1) The extremely varied clinical manifestations and the frequency of opaque ocular media often make the diagnosis of PHPV difficult. Although there are some reports on PHPV diagnosed in adulthood, it is mostly observed in a younger age group.(2) A vascular structure running from the lens to the optic disc and fibrovascular retrolental tissue in a microphthalmic eye is observed on imaging studies

Psychological and physical correlates of disordered eating in male and female Turkish college students

WOS: 000240201100004PubMed ID: 16958937The aim of this study was to examine the relationship between disordered eating and three psychological variables (obsessive and depressive symptoms, self-esteem) and body mass index (BMI) in a sample of male and female college students in Turkey. Maudsley Obsessive-Compulsive Inventory (MOCI), Beck Depression Inventory (BDI), Rosenberg Self Esteem Scale (RSES), Eating Attitude Test (EAT), and Bulimic Investigatory Test, Edinburgh (BITE) scales were administered to 408 college students (279 women; 129 men). By multiple regression analysis, the scales of MOCI, BDI, RSES and BMI were used as potential predictors of EAT and BITE scores for each gender. Obsessionality and BMI were the strongest predictors of bulimic and anorexic symptoms in women. In men, while the strongest predictors of bulimic symptoms were the depressive and obsessive symptoms, the best predictor of anorexic symptoms was obsession scores. There were significant differences and some similarities between male and female Turkish college students

The Dosimetric Impact of Implants on the Spinal Cord Dose During Stereotactic Body Radiotherapy

Background The effects of spinal implants on dose distribution have been studied for conformal treatment plans. However, the dosimetric impact of spinal implants in stereotactic body radiotherapy (SBRT) treatments has not been studied in spatial orientation. In this study we evaluated the effect of spinal implants placed in sawbone vertebra models implanted as in vivo instrumentations. Methods Four different spinal implant reconstruction techniques were performed using the standard sawbone lumbar vertebrae model; 1. L2-L4 posterior instrumentation without anterior column reconstruction (PI); 2. L2-L4 anterior instrumentation, L3 corpectomy, and anterior column reconstruction with a titanium cage (AIAC); 3. L2-L4 posterior instrumentation, L3 corpectomy, and anterior column reconstruction with a titanium cage (PIAC); 4. L2-L4 anterior instrumentation, L3 corpectomy, and anterior column reconstruction with chest tubes filled with bone cement (AIABc). The target was defined as the spinous process and lamina of the lumbar (L) 3 vertebra. A thermoluminescent dosimeter (TLD, LiF:Mg,Ti) was located on the measurement point anterior to the spinal cord. The prescription dose was 8 Gy and the treatment was administered in a single fraction using a CyberKnife® (Accuray Inc., Sunnyvale, CA, USA). We performed two different treatment plans. In Plan A beam interaction with the rod was not limited. In plan B the rod was considered a structure of avoidance, and interaction between the rod and beam was prevented. TLD measurements were compared with the point dose calculated by the treatment planning system (TPS). Results and discussion In plan A, the difference between TLD measurement and the dose calculated by the TPS was 1.7 %, 2.8 %, and 2.7 % for the sawbone with no implant, PI, and PIAC models, respectively. For the AIAC model the TLD dose was 13.8 % higher than the TPS dose; the difference was 18.6 % for the AIABc model. In plan B for the AIAC and AIABc models, TLD measurement was 2.5 % and 0.9 % higher than the dose calculated by the TPS, respectively. Conclusions Spinal implants may be present in the treatment field in patients scheduled to undergo SBRT. For the types of implants studied herein anterior rod instrumentation resulted in an increase in the spinal cord dose, whereas use of a titanium cage had a minimal effect on dose distribution. While planning SBRT in patients with spinal reconstructions, avoidance of the rod and preventing interaction between the rod and beam might be the optimal solution for preventing unexpectedly high spinal cord doses.PubMedWoSScopu