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Öğe A detailed 3D volumetric magnetic resonance arthrographic analysis in a spiral ligament and anteroinferior capsuloligamentous complex of the shoulder joint(Springer, 2025) Yahsi, Yusuf; Ogul, Hayri; Ertogrul, Rodi; Sakci, Zakir; Guclu, Derya; Ozdemir, MustafaObjectivesThis study aimed to delineate the anatomical characteristics of the spiral glenohumeral ligament (SpiGHL), middle glenohumeral ligament (MGHL), and anterior band of inferior glenohumeral ligament (AB-IGHL), as well as their potential interrelationships, using MR arthrographic images from a large patient population.MethodsAll patients underwent 3D volumetric magnetic resonance (MR) arthrography sequences in addition to conventional MR imaging. All MR arthrography images were retrospectively assessed by two radiologists with expertise in arthrography. The origins and insertions of SpiGHL, MGHL, and AB-IGHL, along with any variations and interrelationships, were carefully examined and documented. These findings were statistically analyzed according to the patient's age, gender, and laterality of the shoulder (right or left).ResultsThe study included 190 shoulder MR arthrographies, identifying SpiGHL in 15 patients (7.9%). Among the 190 patients, 20 (10.5%) had an AB-IGHL with a high insertion on the anterior glenoid margin. In 10 of 15 patients with SpiGHL (66.6%), a conjugation of SpiGHL and MGHL was observed. MGHL hypoplasia was observed in 11 MR arthrographies. Of the 11 patients, 5 (45.5%) also presented with SpiGHL. The incidence of SpiGHL was significantly higher in the group with hypoplastic MGHL. Additionally, the average age of patients with a high-origin AB-IGHL was significantly lower than that of patients without this feature.ConclusionsKnowing the anterior capsuloligamentous detailed anatomy of the shoulder joint and its possible variations is important in correctly interpreting the pathologies of this region. The spiral GHL and its possible relationship with other ligaments can be defined in detail on MR arthrography.Öğe Evaluation of parenchymal collaterals in patients with meningioma using contrast-enhanced T1 MPRAGE sequence(Masson Editeur, 2025) Gozgec, Elif; Ogul, Hayri; Naldemir, Ibrahim Feyyaz; Sakci, Zakir; Kantarci, MecitBackground: Post-contrast T1-MPRAGE sequence has been used in routine tumor imaging at many centers for decades. Meningiomas may be accompanied by leptomeningeal as well as parenchymal collaterals. In this study, we aimed to demonstrate the collaterals that may accompany meningiomas on postcontrast T1-MPRAGE imaging and to investigate their relationship with location, size, histologic features, adjacent bone, and parenchymal changes. Methods: In this study, postcontrast T1-MPRAGE images of 326 meningiomas from 259 patients were independently analyzed by two observers. The presence of parenchymal collaterals and unilateral, contralateral or bilateral localization were determined. Meningiomas' diameters, locations, presence of dural sinus invasion, associated parenchymal changes and bony changes were determined. Histologic grades were determined if applicable. The data obtained were analyzed statistically. Results: Parenchymal collaterals were demonstrated in 25% of meningiomas (66/259). Of these, 65% were unilateral, 12% contralateral and 23% bilateral. There was a significant correlation between malignancy and the presence of collaterals in histologically diagnosed meningiomas (77%, p = 0.01). The presence of collaterals was also significantly higher in meningiomas with sinus invasion and bone destruction (p < 0.001). As tumor size increased, unilateral and bilateral collateral development increased (p < 0.001, p = 0.008, respectively), but it was not significant in contralateral cases. There was significant concordance between the observers in terms of the presence of collaterals (kappa: 0.773). Conclusions: Meningiomas may be accompanied by parenchymal collaterals. WHO grade 3 histologic type, sinus invasion, bone destruction and size increase are predictors of collateral development.Öğe Posterior shoulder labrocapsular structures in all aspects; 3D volumetric MR arthrography study(British Inst Radiology, 2021) Ogul, Hayri; Taydas, Onur; Sakci, Zakir; Altinsoy, Hasan Baki; Kantarci, MecitPathologies of the posterior labrocapsular structures of the shoulder joint are far less common than anterior labrocapsuloligamentous lesions. Most of these pathologies have been associated with traumatic posterior dislocation. A smaller portion of the lesions include posterior extension of superior labral anteroposterior lesions, posterior superior internal impingement, and damage to the posterior band of the inferior glenohumeral ligament. Labrocapsular anatomic variations of the posterior shoulder joint can mimic labral pathology on conventional MR and occasionally on MR arthrographic images. Knowledge of this variant anatomy is key to interpreting MR images and studying MR arthrography of the posterior labrocapsular structure to avoid misdiagnosis and unnecessary surgical procedures. In this article, we review normal and variant anatomy of the posterior labrocapsular structure of the shoulder joint based on MR arthrography and discuss how to discriminate normal anatomic variants from labrocapsular damage.Öğe Solitary Metastasis Mimicking Glioblastoma in a Patient with Fahr's Disease(Springer India, 2025) Taydas, Onur; Has, Busra; Sakci, Zakir; Ogul, Hayri; Kantarci, MecitFahr's disease is defined as the accumulation of bilateral idiopathic calcification in the basal ganglia, dentate nucleus, and centrum semiovale. The coexistence of Fahr's disease and intracranial tumors is extremely rare, with only five cases documented in the literature. This study aimed to present a rare case, discussing both similarities and differences with previously reported cases. A 70-year-old female patient presented to our hospital with a progressive headache over the past month. Brain magnetic resonance imaging (MRI) with intravenous contrast was performed for further evaluation. Bilateral basal ganglia, thalamus, and dentate nuclei showed calcifications consistent with Fahr's disease. After excluding toxic, infectious, and endocrine causes of calcification, the patient was diagnosed with Fahr's disease. Magnetic resonance imaging also revealed a midline localized, irregularly contoured, and heterogeneously intense mass with contrast enhancement at the centrum semiovale level, accompanied by peripheral edema. Radiologically, the mass resembled a high-grade glioma or metastasis, and the presence of a lipid peak further suggested metastasis. Based on radiological findings, the patient was diagnosed with brain metastasis of breast carcinoma. The patient received chemotherapy for metastasis, which resulted in substantial regression of the mass. In patients with known Fahr's disease, new-onset headaches and related symptoms should warrant evaluation for possible brain tumors. In these cases, imaging findings should be assessed along with physical examination findings and the patient's medical history to support the diagnostic process.Öğe Spontaneous radiocephalic arteriovenous fistula presenting as a phalangeal mass(Ma Healthcare Ltd, 2021) Tas, Nurmuhammed; Altinsoy, Hasan B.; Sakci, Zakir; Ogul, Hayri[Abstract Not Available]
