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Browsing by Author "Ceken, Kagan"

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    Article
    Mature Cystic Renal Teratoma
    (Kowsar Publ, 2014) Yavuz, Alpaslan; Ceken, Kagan; Alimoglu, Emel; Akkaya, Bahar
    Teratomas are rare germline tumors that originate from one or more embryonic germ cell layers. Teratoma of the kidney is extremely rare, and less than 30 cases of primary intrarenal teratomas have been published to date. We report the main radiologic features of an unusual case of mature cystic teratoma arising from the left kidney in a two-year-old boy. A left-sided abdominal mass was detected on physical examination and B-Mod Ultrasound (US) examination revealed a heterogeneous mass with central cystic component. Computed tomography (CT) demonstrated a lobulated, heterogeneous, hypodense mass extending craniocaudally from the splenic hilum to the level of the left iliac fossa. Nephrectomy was performed and a large, fatty mass arising from the left kidney was excised. The final pathologic diagnosis was confirmed as cystic renal teratoma.
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    Article
    The Reliability of Color Doppler "twinkling" Artifact for Diagnosing Millimetrical Nephrolithiasis: Comparison With B-Mode Us and Ct Scanning Results
    (Springer Japan Kk, 2015) Yavuz, Alpaslan; Ceken, Kagan; Alimoglu, Emel; Kabaalioglu, Adnan
    To compare the effectiveness of B-Mode and color-Doppler ultrasound imaging features, including "twinkling-artifact" with unenhanced CT for detecting millimetrical nephrolithiasis. 397 patients were examined for suspected urolithiasis with US and CT were included. US findings such as echogenic focuses, posterior acoustic shadowing and twinkling artifact were examined for their ability to detect millimetricalcalculies (greatest diameter a parts per thousand currency sign5 mm) using CT findings as the gold-standard. The accuracy of US for measuring stone size was also investigated. 219 millimetriccalculies in 164 cases were detected by CT. The sensitivity and positive-predictive-values for the detection of microcalculies were 76.7 and 94.9 %, 85.8 and 88.3 %, 40.6 and 97.8 %, 68.9 and 94.4 %, and 38.4 and 97.7 % for the presence of B-Mode echogenity, twinkling-artifact, B-Mode echogenity with acoustic shadowing, B-Mode echogenity with twinkling-artifact, B-Mode echogenity with acoustic shadowing and twinkling-artifact, respectively. No significant difference between US and CT was observed in quantification of nephrolithiasis sizes (p = 913). Twinkling-artifact based color-Doppler US is preferable for the sensitive detection of millimetrical nephrolithiasis; however, the high false-positive value of this technique, which can lead to an overestimation of the stone number, has to be considered.