Bulent Karaman

Retroaortic left renal vein: multidetector computed tomography angiography findings and its clinical importance.

Purpose: To evaluate the appearance, type, frequency, and clinical importance of retroaortic left renal vein (RLRV) in patients examined with multidetector computed tomography (MDCT) angiography. Material and Methods: A total of 1856 patients who underwent CT with urological symptoms (hematuria, flank and abdominal pain, left gonadal vein varicocele) (n = 889) or with symptoms other than urological ones (n = 967) were prospectively evaluated for the presence of RLRV. CT was performed with 110 ml of iodinated contrast material through the antecubital vein at a rate of 3.5 ml/s. Late arterial and early venous phase volumetric data sets were acquired at 30 and 65 s, respectively, from the start of the intravenous injection of contrast medium. In addition to axial images, multiplanar reconstructions (MPR), maximum-intensity projection (MIP), and three-dimensional volume-rendering (3D VR) images were used to assess left renal vein anomalies. Left renal vein anomalies were classified into four types according to their appearance: I) RLRV joining the inferior vena cava (IVC) in the orthotopic position; II) RLRV joining the IVC at level L4–L5; III) circumaortic or collar left renal vein; IV) RLRV joining the left common iliac vein. Results: RLRV was detected in 68 (3.6%) of the 1856 patients, with 26, 22, 17, and three of types I, II, III, and IV, respectively. Forty-four of the 68 patients with RLRV (65%) were in the group with urological symptoms, while 24 patients (35%) were in the group without urological symptoms. Compression of the RLRV was found in 16 patients in the urological symptoms group, while compression was detected in only three patients in the other group. This difference was statistically significant (P<0.05). The most common urological symptom was hematuria. The frequency of urological symptoms was higher in groups II and IV compared to the other groups. Conclusion: MDCT angiography with axial, MPR, MIP, and 3D VR images is effective in the detection of vascular renal anomalies such as RLRV. Diagnosing RLRV and differentiating it from other pathologic conditions causing hematuria is important in order to avoid complications during retroperitoneal surgery or interventional procedures.

Multiple rice body formation in the subacromial-subdeltoid bursa and knee joint.

Multiple rice body formation is an uncommon disorder which resembles synovial chondromatosis both radiologically and clinically. The clinical symptoms are usually non-specific. We report on a pathologically proven multiple rice body formation in both the left subacromial-subdeltoid bursa and knee joint in a 4-year-old girl.

Pulmonary artery embolism due to a ruptured hepatic hydatid cyst: clinical and radiologic imaging findings

Hydatid pulmonary embolism is an uncommon condition resulting from the rupture of a hydatid heart cyst or the opening of a visceral hydatid cyst into the venous circulation. We report a rare case with multiple intra-arterial pulmonary hydatid cyst emboli originating from a hepatic hydatid cyst ruptured into the hepatic segment of the inferior vena cava. We present the ultrasonography findings of hepatic hydatid cyst and multidetector computed tomography pulmonary angiography images demonstrating both multiple hydatid cyst emboli and their hepatic origin.

Asymmetry of the height of the ethmoid roof in relationship to handedness

The aim of this work was to study the handedness differences in the height of the right and left ethmoid roofs. Hand preference was assessed using the Edinburgh Handedness Inventory. The height of the right and left ethmoid roofs was measured with computerised tomography (CT). The incidence of persons who had a lower ethmoid roof on the right side was significantly greater among right-handers than among left-handers; the incidence of persons who had a lower ethmoid roof on the left side was significantly greater among left-handers than among right-handers; and right and left ethmoid roofs were equal in all ambidextrous subjects. The relationship between the asymmetric ethmoid roofs and handedness may result from the right or left embryonic craniofacial region being smaller in the right- or left-handed subjects. This is particularly important in the light of the high degree of variability in the ethmoid roof, and even between the right and left sides in a given individual. Preoperative awareness of a patients unique sinus anatomy may help prevent iatrogenic injury to the surrounding vital structures during ethmoid sinus surgery (ESS).

Is it possible to differentiate between hydatid and simple cysts in the liver by means of diffusion-weighted magnetic resonance imaging?

OBJECTIVE Our aim was to evaluate the contribution of diffusion-weighted imaging to the differentiation of hydatid cysts (HCs) from the simple cysts and to the identification of the HC subtypes. MATERIALS AND METHODS A total of 37 patients were included in this retrospective study. Fifty of these patients had diagnosed liver cysts (28 HCs and 22 simple cysts) of at least 1 cm in size. All of the cysts were examined with sonography and magnetic resonance imaging, and the HCs were classified according to the World Health Organization criteria. RESULTS Twenty-eight of the total 50 cysts were HCs, and 22 were simple cysts. When the apparent diffusion coefficient (ADC) values of all HCs were compared with the ADC values of the simple cysts, a statistically significant relationship was found (P=.001). The optimal ADC threshold value was established as 2.5 s/mm(2). The sensitivity, specificity, positive predictive value, negative predictive value and accuracy rates were 60%, 95%, 94%, 65% and 76%, respectively. CONCLUSION Diffusion-weighted imaging-magnetic resonance imaging is a considerably helpful technique for differentiating between HCs and simple cysts and for differentiating between HC subtypes.

Optimum height from the roof of the choana for seeking the sphenoid ostium.

Objective: The purpose of this study was to investigate the optimum height that the sphenoid sinus ostium can be probed safely from the roof of choana in a large group of patients. Methods: The study was performed retrospectively. The 200 sphenoid ostia of the 100 patients whose thin-section computed tomography (CT) including the sphenoid sinus region, made for various reasons, were included in the study. The height of the sphenoid ostium and the skull base from the choana roof were measured on sagittal images of CT. Also, by calculating the ratio of first measurement to the second one, the location of the sphenoid ostium at the anterior wall of sphenoid sinus was determined proportionally. Results: The mean height of the sphenoid ostium from the choana roof was 10.9 (SD, 2.3) mm (range, 5.7-21.5 mm), and the mean height of skull base along the anterior wall of sphenoid sinus from the choana roof was 21.3 (SD, 3.2) mm (range, 13.3-30.6 mm). The ratio of the first measurement to the second measurement was 0.5 (SD, 0.08) (range, 0.29-0.77). Conclusions: In conclusion, under endoscopic view, the sphenoid sinus ostium can be safely probed between 13.3 mm (the minimum skull base height) and 5.7 mm (the minimum sphenoid sinus ostium height) distance upward from the choana, but determining the height of the sphenoid sinus ostium preoperatively on CTs for each patient separately will increase the chance of success in probing the sphenoid sinus.

The anatomic evaluation of the internal mammary artery using multidetector CT angiography.

PURPOSE To determine the normal anatomic features and variations of the internal mammary arteries (IMAs) and to describe the relationship between the diameter and distance to the sternal edge of the IMAs, gender, and location (right-left) of the IMAs in patients who underwent multidetector computed tomography (MDCT) angiography of the thorax for various reasons. MATERIALS AND METHODS A total of 164 patients who underwent MDCT angiography of the thoracic vascular structures for various reasons were analyzed retrospectively. The right and left IMAs were analyzed individually, and normal anatomic features and variations were recorded. The relationships between gender, side and diameter of the IMAs, and distance to the sternal edge of the IMAs were evaluated. RESULTS There were 328 (164 right, 164 left) IMAs in 164 patients (110 males, 54 females; mean age, 43.96 years). A total number of five arteries (1.5%) had anatomic variation. Whereas 325 IMAs had an origin separate from the subclavian artery, three LIMA of the 328 arteries (0.91%) had a common origin with the thyrocervical trunk or costocervical trunk. Two (0.6%) IMAs (one LIMA and one RIMA) in the same patient were duplicated at the level of the first and second costal cartilage. There were no statistically significant correlations between age and diameter or between gender and diameter of the RIMA and LIMA at the origin and level of tracheal bifurcation (P > 0.05). Mean distance between the lateral margin of the sternum and midpoint of LIMA and RIMA were 12.42 mm and 13.00 mm, respectively. CONCLUSION The normal anatomic features and variations of the IMAs have an important role in cardiovascular bypass surgery, breast reconstruction, and percutaneous transthoracic procedures. MDCT angiography allows a precise and detailed evaluation of IMAs.

Gadolinium-enhanced 3D MR angiography of pulmonary hypoplasia and aplasia.

OBJECTIVE The goal of this study was to determine the role of gadolinium-enhanced 3D MR angiography (MRA) in patients with suspected pulmonary hypoplasia and aplasia in a retrospective analysis of MRA and digital subtraction angiography in 11 patients with clinical and/or radiologic suspicion of pulmonary hypoplasia and aplasia. CONCLUSION Gadolinium-enhanced 3D MRA is capable of diagnosing pulmonary hypoplasia and aplasia rapidly and accurately. Both pulmonary hypoplasia and aplasia can be shown morphologically in a noninvasive manner, obviating digital subtraction angiography.

Percutaneous treatment of a primary pancreatic hydatid cyst using a catheterization technique.

Primary pancreatic hydatid cysts are rare and its percutaneous treatment and catheterization technique has, to the best of our knowledge, not been published in literature. A 33-year-old male patient who presented with abdominal pain was evaluated by ultrasonography (US) and computed tomography examinations. Both examinations revealed a cyst in the neck of the pancreas. After the administration of albendazole chemoprophylaxis, the patient underwent diagnostic puncture showing high pressure spring water which harbored the scoleces and was treated percutaneously by the catheterization technique. In this technique, first the cyst was punctured, the fluid content aspirated, the radiocontrast material injected to see possible fistulisation, and then re-aspirated. The 20% hypertonic saline solution was injected and re-aspiration was performed to the best of our abilities, followed by the insertion of a catheter for drainage of the remaining non-aspiratable fluid content. At follow-up examination, the cyst was not visible on US after 6 months. There was no evidence of cyst recurrence or dissemination after 18 months at serologic and imaging follow-up.

Serum chitotriosidase activity in pulmonary tuberculosis: response to treatment and correlations with clinical parameters.

Background Chitotriosidase is an accepted marker of macrophage activation. In this study, we investigated serum chitotriosidase levels in pulmonary tuberculosis (PTB). Methods Forth-two patients with PTB and 30 healthy subjects were enrolled in the study. The radiological extent of PTB, radiological sequela after treatment, and the degree of smear positivity were assessed. Chitotriosidase levels were measured by a fluorometric method. Results The serum chitotriosidase levels of the PTB patients were significantly higher than those of the control subjects (39.73±24.97 vs. 9.63±4.55 nmol/mL/h, P<0.001). After completion of the standard 6-month antituberculous treatment, chitotriosidase levels in PTB patients significantly decreased (10.47±4.54 nmol/mL/h, P<0.001). Chitotriosidase levels correlated significantly with the radiological extent of PTB, degree of smear positivity, and post-treatment radiological sequela score (r=0.439, r=0.449, and r=0.337, respectively). Conclusions This study demonstrated that serum chitotriosidase levels increase in PTB; therefore, chitotriosidase can be used as a marker of disease activity, severity, and response to treatment.