Browsing by Author "Ucar, Ilyas"

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Association of Chiari Type 1 Malformation and Cervical Spine Curve Changes
(Wolters Kluwer Medknow Publications, 2021) Alpaslan, Muhammed; Ozkacmaz, Sercan; Dadali, Yeliz; Ucar, Ilyas
Introduction: In this study, we aimed to examine the association of cervical spine curve abnormalities (loss of cervical lordosis or reversal of cervical curve) with Chiari Type 1 malformation (CM1). Further, a possible relation of syrinx formation in the cervical spinal cord and disc protrusion with CM1 was analyzed. Material and Methods: Cervical spinal magnetic resonance imagings of 998 patients were retrospectively screened for the presence of CM1. The frequency rates of syrinx formation within the spinal cord, cervical spinal curve changes, and cervical disc herniation among CM1+ and CM1- patients were compared. Results: Patients with CM1 have significantly higher rate of loss of cervical lordosis when compared with those who have not CM1. The syrinx formation rate was also found lower in the CM1+ patients with loss of cervical lordosis than in CM1+ patients with either normal cervical lordosis or reversed cervical curve. No significant difference was detected between CM1+ and CM1- patients regarding cervical disc herniation rate. Discussion and Conclusion: As the loss of cervical lordosis rate is higher in CM1, the patients with lateral X-ray findings of cervical lordosis flattening may be evaluated regarding typical neurological symptoms of syringomyelia.
The Morphological Variants of Dural Venous Sinuses
(Wolters Kluwer Medknow Publications, 2020) Ozkacmaz, Sercan; Dadali, Yeliz; Alpaslan, Muhammed; Ucar, Ilyas
Introduction: In this study, we aimed to analyze the dural venous system variations in Turkey by magnetic resonance imaging examinations. Material and Methods: Images of a total of 200 patients (65 males, 135 females M/F: 0.48) who underwent a magnetic resonance venography examination were retrospectively screened. Results: Variation was detected in 101 patients (53.85% of males [35/65] and 48.89% of females [66/135]). In 16.5% of the patients, only one variation of dural venous system was detected, while the most common variation was left transverse hypoplasia in this group. Twenty-six percent of the patients had two variations of the dural venous system since the most common dual variations were left transverse hypoplasia + left sigmoid hypoplasia in this group. In 8% of the patients, three or more variations of the dural venous system were observed as the most common variations were right transverse hypoplasia + right sigmoid hypoplasia + presence of occipital sinus in this group. Discussion and Conclusion: It is essential to know the anatomical variations of the dural venous system for the discrimination between pathological processes such as thrombosis and physiologic conditions. Furthermore, the association of these variations with each other must be kept in mind for the explanation of the presence of multiple variations in the same individuals.