Aims: To investigate the accuracy of multidetector computed tomography (MDCT) findings, and the effect of tumor volume in determining the perinephric and renal sinus invasion in clear cell renal cell carcinomas (ccRCCs). Method: Fifty patients with ccRCCs underwent non-contrast and nephrographic-phase contrast-enhanced MDCT examination before total nephrectomy. The following MDCT features were used to diagnose perinephric fat tissue invasion: perinephric stranding, perinephric vascularity, and irregular contour. The following MDCT features were used to diagnose renal sinus fat invasion: elongation of tumor into renal sinus, invasion, or compression of pelvicalyceal system. Histopathologic examinations were used as a gold standard. Results: Fourteen out of 50 ccRCCs patients (28%) had histopathological-proven perinephric fat tissue invasion. The sensitivity, specificity, PPV, NPV, and accuracy of MDCT in the detection of perinephric fat tissue invasion were found 64%, 58%, 38%, 80%, and 60%, respectively. Seven out of 50 ccRCCs patient (14%) had histopathological-proven renal sinus invasion. The sensitivity, specificity, PPV, NPV, and accuracy of MDCT in the detection of renal sinus invasion were found 85%, 65%, 28%, 96%, and 68%, respectively. The area under of curve (AUC) value of tumor volume in the detection of perinephric fat invasion was 0.631. The AUC value of tumor volume in the detection of renal sinus invasion was 0.803. Conclusion: MDCT has a good sensitivity for detection of renal sinus fat invasion, but low PPV and specificity in patients with ccRCC. Tumor volume, and invasion into the pelvicalyceal structures can aid in the diagnosis of renal sinus fat invasion preoperatively.

Aim: To determine the carotid body (CB) size and its relationship with hypertension, other sympathetically mediated disorders and smoking. Materials and Methods: Neck CT angiographies of 180 patients performed in our clinic in the previous year were included in the study. The patients' histories were assessed for hypertension (HT), congestive heart failure (CHF), diabetes mellitus (DM), chronic obstructive pulmonary disease and smoking. The study groups were smokers without any chronic condition (S group, n=21), patients with HT alone (HT group, n=26), patients that had at least two chronic disorders (CD+S group, n=78) and the controls (n=33). The widest axial diameter of the CB was measured on axial sections. Results: CB diameter could be measured in 158 patients. The CB diameter was significantly greater in HT (2.77±3.28 mm, p=0.02) and CD+S (2.76±3.38 mm, p

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Amaç: Parotis bezi kitlelerinde ultrasonografi (US) ve bilgisayarlı tomografi (BT) bulgularının benign-malign ayrımındaki rolünü araştırmak. Materyal Metod: Fizik muayene ile parotis bezinde kitle saptanan 45 hastaya US ve BT incelemesi yapıldı. US’de kitlelerin yeri (yüzeyel lob-derin lob), boyutu, konturu (iyi sınırlı (düzgün-lobüle), irregüler), ekojenitesi (anekoik, hipoekoik, izoekoik veya hiperekoik), eko yapısı (homojen veya heterojen) değerlendirildi. BT’de boyut, kontur (iyi sınırlı (düzgün-lobüle), irregüler), kontrast tutulumu (homojen, heterojen) değerlendirildi. Otuzdokuz olgu opere oldu ve histopatolojik tanı aldı. Altı olguya ince iğne biyopsisi sonrası histopatolojik tanı kondu. Bulgular: Kırk beş kitlenin 39’u (86,7%) benign, 6’sı (13,3) maligndi. Benign olan 39 kitlenin 28’i pleomorfik adenom, 5’i Warthin tümörü, 1’i kapiller hemanjiom, 1’i, dermoid kist, 1’i lipom, 2’si tüberküloz lenf adenit, 1’i granülomatöz lenf adenit tanısı aldı. Malign olan 6 olgunun 1’i adenoid kistik kanser, 2’si lenfoma, 1’i malign melanom, 1’i kondrosarkom, 1’i mukoepidermoid karsinom tanısı aldı. Benign lezyonların tümünde US’de ve BT’de düzgün veya lobüle kontur saptanmış olup lezyonlar iyi sınırlıydı. Lenfoma saptanan 2 olguda iyi sınırlı ve lobüle konturluydu. Malign olan 4 lezyonda US ve BT’de irregüler kontur izlendi. US’de pleomorfik adenomların %79’unda, Warthin tümörlerinin %40’ında, lenfomalı 2 olguda homojen eko yapısı saptandı. Pleomorfik adenomların %21’inde ve tüm malign kitlelerde heterojen eko saptandı. BT’de pleomorfik adenomların %92,9’unda, Warthin tümörlü olguların %40’ında, lenfomalı iki olguda homojen kontrastlanma saptanırken, Pleomorfik adenomların %7,1’inde, malign olan 4 olguda heterojen kontrastlanma izlendi. Warthin tümörlü 3 olguda kistik komponent izlendi. Sonuç: US ve BT parotis kitlelerinde benign-malign ayrımında ve lezyonların ayırıcı tanısında kullanılabilir. İrregüler kontur ve çevre dokulara invazyon maligniteyi düşündürmelidir. BT ile lezyonların yerleşim ve uzanımları US’ye göre daha iyi değerlendirilmektedir.