Tıp Fakültesi / Faculty of Medicine

Permanent URI for this collectionhttps://hdl.handle.net/11727/1403

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2016 - 20194

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Author: search.filters.author.Aslan, Hulyasearch.filters.applied.f.rights: search.filters.rights.info:eu-repo/semantics/closedAccess

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    Association Between the Elasticity of Hip Muscles and the Hip Migration Index in Cerebral Palsy
    (2019) Analan, Pinar Doruk; Aslan, Hulya; https://orcid.org/0000-0002-3528-3712; https://orcid.org/0000-0002-7138-246X; 30779197; AAA-8043-2021; AAK-9104-2021
    Objectives-Cerebral palsy (CP) increases the risk of hip displacement during childhood. Abnormal hip muscle forces have been proposed as the predisposing factors. In CP, the amount of hip displacement is commonly evaluated by the Reimers hip migration index (MI) on an anteroposterior pelvic radiograph. To the best of our knowledge, the association between the elasticity of hip muscles measured by shear wave elastography and the MI has not been studied yet. Herein, we aimed to analyze the correlation between the elasticity of hip muscles and the MI. Methods-Bilateral hips of 25 children with spastic CP were included prospectively in this study. Anteroposterior pelvic radiographs were used to measure the MI. Shear wave elastography was performed to evaluate the elasticity of muscles. The correlation between the MI and the elasticity of hip flexor and adductor muscle groups was assessed. Also, the association between the elasticity of agonist/antagonist muscles was analyzed. Results-The MI showed fair to good correlations with hip flexors and adductors for both readers (0.71 >= r >= 0.52). The mean MIs of the patients +/- SDs were 22.64% +/- 7.79% for reader 1 and 21.55% +/- 8.83% for reader 2. The elasticity of agonist/antagonist muscle groups showed little/no to a weak correlation for both readers (0.32 >= r >= -0.07). Conclusions-Although, hip flexor and adductor muscle elasticity showed a correlation with MI, it seems very hard to say that increased elasticity of hip flexor and adductor muscles causes hip dislocation.
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    Idiopathic Granulomatous Mastitis: Magnetic Resonance Imaging Findings with Diffusion
    (2016) Aslan, Hulya; Pourbagher, Aysin; Colakoglu, Tamer; https://orcid.org/0000-0002-7138-246X; 26508792; AAK-9104-2021
    Background: Idiopathic granulomatous mastitis (IGM) is a rare benign breast disease with unknown etiology which can mimic breast carcinoma, both clinically and radiologically. Magnetic resonance imaging (MRI) findings of IGM have been previously described; however there is no study evaluating diffusion-weighted MRI findings of IGM. Purpose: To analyze conventional, dynamic contrast-enhanced, and diffusion-weighted MRI signal characteristics of IGM by comparing it with the contralateral normal breast parenchyma. Material and Methods: A total of 39 patients were included in the study. On dynamic contrast-enhanced MRI, the distribution and enhancement patterns of the lesions were evaluated. We also detected the frequencies of involving quadrants, retroareolar involvement, accompanying abscess, and skin edema. T2-weighted (T2W) and STIR signal intensities and both mean and minimum apparent diffusion coefficient (ADC) values were compared with the contralateral normal parenchyma. Results: IGM showed significantly lower mean and minimum ADC values when compared with the normal parenchyma. Signal intensities on T2W and STIR sequences of the lesion were significantly higher than the normal parenchyma. On dynamic contrast-enhanced MRI, 7.7% of the patients had mass-like contrast enhancement, 92.3% of the patients had non-mass-like contrast enhancement. Abscess was positive in 33.3% of the patients. Conclusion: As a result, IGM showed commonly non-mass-like lesions with restricted diffusion. Although it is a benign pathology, it may show clustered ring-like enhancement like malignant lesions.
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    The Role of Shear-Wave Elastography in the Differentiation of Benign and Malign Non-Mass Lesions of the Breast
    (2018) Aslan, Hulya; Pourbagher, Aysin; Ozen, Merve; 0000-0002-7138-246X; 30569901; AAK-9104-2021; HCH-8774-2022
    AIM: The aim of this study is to retrospectively assess the additional diagnostic value of shear wave elastography (SWE) added to ultrasound (US) versus US alone in differentiating malignant and benign non-mass lesions (NMLs) of the breast by readers with different experience levels and to assess interreader agreement. MATERIAL AND METHODS: This retrospective study enrolled 53 NMLs (31 benign, 22 malignant). Two radiologists (readers 1 and 2 had 15 years and 1 year of experience in breast imaging, respectively) independently reviewed each study and determined the BI-RADS category using US alone and again after adding SWE to US. Diagnostic performances of US alone and US combined with SWE were compared for both readers. Areas under receiver operating characteristic curves (AUCs) were estimated. The levels of interobserver agreement were determined by the calculated kappa coefficient. RESULTS: With the addition of SWE to US, AUCs for differentiation of benign and malignant lesions increased sign/ icantly for the less experienced reader (0.56 vs. 0.79; p=0.028), but not for the more experienced reader (0.60 vs. 0.75; p=0.170). While evaluating US alone, the interobserver agreement was moderate, and the interobserver variability among the readers was statistically significant (k=0.493, p<0.001). After adding SWE, the agreement increased to 0.773, and the interobserver variability among the readers became non-significant (k=0.773, p=0.688) CONCLUSIONS: SWE increased the diagnostic performance of relatively less experienced reader significantly. SWE improved interobserver agreement of two readers with different levels of experience and reduced the interobserver variability in differentiating benign and malignant NMLs of the breast.
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    Is There A Correlation Between the Severity of Idiopathic Granulomatous Mastitis and Pre-Treatment Shear-Wave Elastography Findings? Original Research
    (2018) Aslan, Hulya; Arer, Ilker Murat; Pourbagher, Aysin; Ozen, Merve; 0000-0002-7138-246X; 30665211; AAK-9104-2021; HCH-8774-2022
    AIM: The aim of this study was to analyze the correlation between the severity of idiopathic Garulomatous Mastitis (IGM) and the pre-treatment Shear-Wave Elastography (SWE) findings. MATERIAL AND METHODS: A total of 39 patients diagnosed with granulomatous mastitis were included in the study between the dates of December 2014 and February 2017. The patients were divided into two groups. Group 1 was treated using a conservative protocol and steroids. Group 2 was treated surgically. Pre-treatment SWE findings of both groups were compared. RESULTS: The mean ages of the patients in group 1 and 2 were 38.44 +/- 9.6 and 3605 +/- 7.44 years, respectively. There were not any significant differences between the groups with regard to frequency of BI-BADS categories and Virtual touch tissue imaging (VTI) patterns. The mean Shear-Wave Spead (SWS) were 1.98 +/- 1.02 m/sec and 2.82 +/- 1.66 m/sec in group 1 and 2 respectively. The difference was not significant (p >= 0.05). The BI-RADS categories and VTI patterns did not show significant difference when the recurrent and non-recurrent patients were compared. CONCLUSION: There may not be a correlation with the pre-treatment SWE findings and severity of the IGM.