Hakan Önder

Radiation-free percutaneous nephrostomy performed on neonates, infants, and preschool-age children

AIM The aim of this study was to evaluate the effectiveness and safety of high-frequency linear probe ultrasonographic (US) guidance percutaneous nephrostomy (PN) in terms of diagnostic and therapeutic approach in preschool-age children with urological problems. MATERIALS AND METHODS PN was performed on 40 kidneys in 33 patients (13 girls, 20 boys) aged 3 days - 7 years (mean 4.1 years). All procedures were performed with US guidance utilizing a Shimadzu SDU 2200 Xplus 5-10 mHz probe. Complete blood count, urinalysis, bladder urine culture, blood urea, and creatinine values were obtained before PN placement on the same day. Urine cultures were obtained by nephrostomy tube and compared to bladder urine culture. RESULTS PN procedures were technically successful in 39 kidney units (97.5%). Two major complications were macroscopic hematuria requiring blood transfusions (1 case) and sepsis (1 case). Minor complications were displacement of the catheter (4), urinary tract infection (4), urine extravasation (1), early dislocation of the catheter (1). In three cases, the catheter was replaced. Analysis of bladder urine showed that 13 patients (39.4%) had positive cultures, but analysis of PN urine showed that 25 patients (78.1%) had positive cultures. CONCLUSIONS PN is an easy, safe and efficient diagnostic and therapeutic procedure with few complications even in preschool-age children. The antibiotic regimen should be revised in order to avoid sepsis and urinary tract infection.

Evaluation of pulmonary vein variations and anomalies with 64 slice multi detector computed tomography.

ZusammenfassungDie Lungenvenen sind eine der bedeutendsten Strukturen des Kreislaufs. Im letzten Jahrzehnt wurde erkannt, dass die Lungenvenen eine bedeutende Rolle beim Vorhofflimmern als auslösender Fokus der elektrischen Aktivität spielen. Die primäre Behandlungsmethode des Vorhofflimmerns ist die Ablation des Fokus in den Lungenvenen. Für den besten Erfolg dieser Maßnahme sollte die Anatomie der Lungenvenen vorher gut bekannt sein. MATERIAL UND METHODEN: In unserer Abteilung für Radiologie wurde zwischen Jänner 2008 und Mai 2010 bei 783 Patienten eine computertomographische Angiographie durchgeführt. Die Patienten waren zur Coronar-CT wegen einer bekannten oder suspizierten koronaren Herzerkrankung, bzw. zur CT Angio wegen des Verdachtes auf Pulmonalembolie zugewiesen worden. Alle Untersuchungen wurden auf einem Phillips Brilliance 64 Zeiler Multidetektor CT Gerät durchgeführt. 402 der Patienten waren männlich, 381 weiblich. Das mittlere Alter der Patienten lag bei 48 (14–89) Jahren. Die CT Ergebnisse zur Identifikation der Anatomie der Lungenvenen (inklusive ihrer Varianten und Anomalien) wurden retrospektiv erhoben. ERGEBNISSE: Bei dem Großteil der Fälle mündeten zwei Lungenvenen in den linken Vorhof auf jeder Seite. 18 Variationen wurden rechts und 8 Variationen links entdeckt. Die häufigste kombinierte Variante waren 2 rechts und 4 links (32,3 %) einmündende Lungenvenen. Vier links einmündende Lungenvenen war der häufigste Einfach-Variations Typ (76 %). Zusätzlich wurden ein Situs inversus totalis (0,12 %), 2 partiell anormale pulmonal venöse Rückströme (0,25 %) und ein Szimitar Syndrom (0,12 %) gefunden. SCHLUSSFOLGERUNGEN: Diese Studie zeigt, dass viele Variationen der Lungenvenen mit zunehmender Patientenzahl beobachtet werden. Um eine erfolgreiche und komplikationslose Ablation bzw. Operation zu gewährleisten, sollte die Anatomie der Lungenvenen vor der Prozedur bekannt sein. Die Multidetektor CT ist eine verlässliche bildgebende Methode für die Erfassung der Querschnitts und 3-dimensionalen Anatomie.SummaryPulmonary Veins are one of the major structures of circulation. In the last decade, pulmonary veins have been known to play an important role as the triggering focus of the electrical activity in atrial fibrillation. Primary treatment method of AF is RF ablation of the focus. For the best ablation, the anatomy of PVs should be well established before the procedure. MATERIAL AND METHODS: In our radiology department, 783 patients underwent computed tomography angiography between January 2008 and May 2010. Patients were referred for coronary CTA because of known or suspected coronary artery disease or computed tomography pulmonary angiography (CTPA) because of known or suspect pulmonary embolism. All scanning was performed on Philips Brilliance 64 slice Multidetector CT. The group consisted of 402 male and 381 female patients with the average age of 48 (range 14–89). CT data of patients were retrospectively reviewed to identify the PV anatomy and to determine anatomic variants and anomalies. RESULTS: In the majority of cases, two pulmonary veins drain into the left atrium on each side. Eighteen and eight variations were found in the right and left sides, respectively. Most frequent combined variations were 2R-4L (32.3%) and 4L was the more frequent single variation type (76%). In addition to that one Situs inversus totalis (0.12%), two partial anomalous pulmonary venous returns (0.25%) and one scimitar syndrome (0.12%) were found. CONCLUSION: This study showed that multiple types of variations of PVs can be found with increasing patient number. Therefore, for the successful ablation and surgery without any complications, the anatomy of PVs should be known before the procedure. MDCT is a reliable imaging method for the detailed cross-sectional and 3D anatomy.

Clinical and multidetector computed tomography findings of patients with median arcuate ligament syndrome

OBJECTIVES The present study aimed to present the clinical and multidetector computed tomography (MDCT) findings of patients who were diagnosed with the median arcuate ligament (MAL) syndrome on MDCT retrospectively. METHODS Seven hundred forty-four patients in whom MDCT angiography was performed were retrospectively analyzed for investigating incidental MAL syndrome. RESULTS Twenty-one patients were shown to have MAL syndrome. Of 21 patients, 18 with MAL syndrome were asymptomatic. Three patients had some symptoms. On MDCT angiography, proximal narrowing of the arteries was observed in 21 patients. CONCLUSIONS MDCT is a minimally invasive and useful tool for the diagnosis of MAL syndrome.

Variations of Renal Artery in 820 Patients Using 64-Detector CT-Angiography

Purpose: Renal artery variations are important for clinical reasons. The aim of this study is to determine the originating level and variations of renal arteries with 64-channel multidetector computed tomography (MDCT). Materials and methods: In a university hospital, 820 patients who underwent MDCT angiography of the abdominal aorta were retrospectively evaluated. The number, early division (ED), and originating level of renal artery were evaluated retrospectively. Variations of the renal artery on both sides, the difference between the genders with variations of the renal artery, were compared with chi-square test. Results: Renal artery originating from the level of L1–L2 intervertebral disc was found in 37.0% and 38.9% of patients on the right and left sides, respectively. Renal artery variations, including extrarenal artery (ERA), were found in 27% and ED in 26.7% of the patients. Significant differences were found in ED and ERA prevalence for genders (p = 0.006 and p = 0.043, respectively). The prevalence of both variations is higher in males. Conclusions: An awareness of renal vascular variations is very important for both surgeons and radiologists. In this series, renal arterial variations were found in approximately one-fourth of the study population.

US-guided percutaneous thrombin injection of postcatheterization pseudoaneurysms.

PURPOSE This study retrospectively evaluated ultrasonography-guided (US-guided) percutaneous thrombin injection for the treatment of postcatheterization femoral and brachial artery pseudoaneurysms. MATERIALS AND METHODS Fifty-five patients with postcatheterization femoral artery (n = 53) or brachial artery (n = 2) pseudoaneurysms were treated using US-guided human thrombin (500 IU/mL) injection. Pseudoaneurysm size, thrombin dose, therapy outcome, and complications were documented. Follow-up color Doppler US was performed 7 and 30 days after treatment. Short-duration supplemental compression was applied to six patients at the first week follow-up examination after a reinjection of thrombin had failed. RESULTS Mean pseudoaneurysm volume was 20.3 ± 18.7 cm(3). The mean injected thrombin dose was 478 ± 238 IU. Thirty-eight (69.1%) of the 55 pseudoaneurysms were thrombosed with a single injection, and 11 of 17 pseudoaneurysms were thrombosed after a second injection. All (100%) of the 41 pseudoaneurysms that were diagnosed within the first two weeks of postcatheterization were successfully treated. The overall primary success rate was 89.1% (49 of 55 pseudoaneurysms). Supplemental compression promoted thrombosis in four of the six patients who had treatment failure with thrombin injection. The secondary success rate was 96.4% (53 of 55 pseudoaneurysms). There were no complications. CONCLUSION US-guided thrombin injection was most successful within the first two weeks, and the supplemental compression might aid in the closure of partially thrombosed pseudoaneurysms.

Display with 64-detector MDCT angiography of cerebral vascular variations

PurposeThe aim of this study was to assess the cerebral variations and observe their frequency in the patients who have undergone angiographies with the state of the art 64-slice multidetector computed tomography (MDCT) angiography technique due to various reasons.Methods500 patients (253 women, 247 men) who had CT scan in the period of April 2008 to March 2010 at Dicle University Medicine Faculty Hospital Radiology Unit were surveyed in this study. Patients who had CT scan with brain CT angio protocol were evaluated using multiplanar, maximum intensity projection (MIP) and volume rendering (VR) images in work station.Results773 variations were totally detected among 500 patients. Variations were categorized as Willis polygon, fenestration and other variations. Frequent variations were detected at Willis polygon and posterior communicating artery (PCOA) hypoplasia was detected as the prevalent variation.ConclusionsIn the present study, we have demonstrated that cerebral vascular variations are frequent and that these variations can be detected in a non-invasive manner using the MDCT angiography. The results obtained from our study may serve as preoperative guidelines for the units performing surgical procedures.

US-guided retrograde tibial artery puncture for recanalization of complex infrainguinal arterial occlusions

PURPOSE We aimed to describe the technical aspects and outcomes of the retrograde tibial approach and balloon predilation for recanalization of complex infrainguinal arterial occlusions and determine the efficacy of this approach in minimizing failure rates. MATERIALS AND METHODS Between September 2006 and April 2011, antegrade revascularization failed in 22 limbs with complex total occlusions within the infrainguinal arterial territory. For each of these antegrade failure cases in 22 patients, a retrograde tibial puncture had been attempted. Percutaneous recanalization and predilation were initially performed through tibial access, and final balloon dilatation or stent placement was performed from antegrade femoral access. The patients were followed up for functionality and wound healing. RESULTS Access from the tibial artery was successfully obtained for all patients (100%). Successful recanalization was obtained in 18 patients (82%). Retrograde access was performed from the anterior tibial/dorsalis pedis artery in 12 patients and posterior tibial artery in 10 patients. One major and one minor complications were documented. CONCLUSION Retrograde tibial recanalization technique in the infrainguinal complex arterial occlusion safely increases the success rates of percutaneous recanalization in the failed traditional approach and is a feasible endovascular option to avoid more invasive, time-consuming, and high-risk procedures.

Sonographic Findings of Hepatobiliary Fascioliasis Accompanied by Extrahepatic Expansion and Ectopic Lesions

The aim of the study was to describe the sonographic findings of hepatobiliary fascioliasis with extrahepatic expansion and ectopic lesions.

Unusual metastatic localization of osteosarcoma in a teenager with ventricular tachycardia

Most malignant tumors of the heart are metastatic. Metastatic cardiac tumors are usually associated with Wilms tumor, neuroblastoma, and non-Hodgkin lymphoma in children (Br J Radiol 71:336-339). Osteosarcoma rarely metastasizes to the heart. Twenty-four cases have been reported in the literature so far. The right side of the heart is more commonly involved than the left, and the pericardium and/or myocardium is more frequently involved than the endocardium (Br J Radiol 71:336-339). We report a rare case of osteogenic sarcoma of the right femur with left ventricular metastases presenting with ventricular tachycardia that has not been reported previously. Cardiac tumors are extremely rare, found at a frequency of only 0.001% to 0.28% at autopsy series. The incidence of secondary cardiac tumors is much higher than that of primary cardiac tumors [1]. Secondary intracardiac neoplasms arise most frequently from renal cell carcinoma, bronchogenic carcinoma, Wilms tumor, chondrosarcoma, and osteogenic sarcoma [2]. There are several reports of metastatic childhood osteosarcoma involving the cardiac chambers. However, endocardial left cardiac chamber Fig. 1 Electrocardiogram prese 0735-6757/

Echogenic splenic lesions in a child with type B Niemann-Pick disease.

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