Biomedical subjects
Publications and source records attributed to A Oto.
We describe a case of an oncocytoma occurring in the adrenal gland, a rare location, and describe US and CT findings of this tumor in our patient. The mass was well marginated but heterogeneous on both CT and US and unfortunately the imaging findings of the tumor are non-specific.
The objective of the study was to determine the value of spiral computerized tomography (CT) in detecting urolithiasis in pediatric patients and compare its efficacy with ultrasound (US). Twenty-nine infants aged between 2 to 94 months with clinical presentation suggestive of urolithiasis and a negative or indeterminate plain film were included in the study. Abdominal US and spiral CT were performed in all patients. Presence, size and localization of stones were noted for each patient on both CT and US. The diagnosis of urolithiasis was confirmed by passage of stones spontaneously, extracorporeal shockwave lithotripsy (ESWL), surgery, or clinical follow-up. Presence of stones was confirmed in 23 of 29 patients (79%). Eight patients had single stone and the remaining 15 had multiple stones either in a single localization (single kidney or single ureter) or multiple localizations. Spiral CT detected 57 stones (45 renal and 12 ureteral). US detected 34 stones (59.6%) in 18 (78.2%) patients. US was able to localize 31 stones (68.8%) in 21 kidneys (75%), and 3 stones (25%) in 11 ureters (27.2%). Spiral CT is very effective in the diagnosis of pediatric urolithiasis. Spiral CT is more efficient than US in imaging pediatric patients with symptoms and signs of urolithiasis, when KUB is inconclusive.
Left atrial and dural calcification in chronic renal failure is very rare. Massive atrial calcification can lead to arrhythmia and diagnosis of this condition is important to take prophylactic measures in dialysis patients. Noninvasive diagnosis of left atrial calcification is also important as it can complicate valvular surgery. We report on a patient with chronic renal failure presenting with arrhythmia in whom left atrial calcification involving interatrial septum is diagnosed by thorax CT examination.
Compression of the left main coronary artery by a dilated pulmonary artery can be a life-threatening condition. It can present with angina, symptoms of left ventricular dysfunction, and sudden death. Diagnosis and treatment of this condition is very important. We demonstrate significant compression of the left main coronary artery on coronary angiography and thorax CT examinations.
A case of hepatobiliary cystadenoma with mesenchymal stroma and a case of biliary cystadenocarcinoma are presented. Hepatobiliary cystadenoma and cystadenocarcinoma are rare liver lesions that are difficult to diagnose preoperatively. Regardless of the diagnostic modalities used these two pathologies cannot be differentiated with accuracy. The preoperative diagnosis of biliary cystadenoma and cystadenocarcinoma was suggested due to the radiological detection of vascularity in the septa and the invasion of the thoracoabdominal wall. The surgeon was informed in both of the cases. Pathologic examination confirmed the diagnosis in both of our patients. The radiological features of these pathologies are discussed in detail together with a brief review of the literature.
The association of Q-T interval prolongation, syncope and sudden death is known as the long Q-T syndrome. The syndrome may be familial, associated with congenital deafness, or idiopathic. The diagnosis is based on the electrocardiographic finding of a prolonged Q-T interval with or without T wave abnormalities. In this article, we present a nine-year-old boy admitted to the Hacettepe University Children's Hospital with complaints of syncopal episodes. The prolonged Q-T syndrome was diagnosed as the cause of the syncopal attacks. In addition, the same syndrome was detected in his father. The prolonged Q-T syndrome should be considered in the differential diagnosis of cases with recurrent, unexplained syncope in the pediatric age group.
Two children with exercise-induced tachycardia, one with idiopathic long-QT syndrome, are presented. The patients were evaluated by exercise testing and electrophysiologic study. From the onset of treatment with the beta-blocking agent, pindolol, the patients have been symptom-free. These findings emphasize that children with syncope must be evaluated by ECG, exercise testing, 24-h Holter-monitoring, and finally, electrophysiological study.
Two siblings with sinus node disease are presented. The patients were severely affected and required permanent pacing. A cardiac electrophysiologic study was conducted in Case 2, which revealed an atrioventricular conduction disturbance in addition to sinus node dysfunction. The parents and other siblings showed no evidence of sinus node disorder. The occurrence of this disease in these siblings suggests an autosomal dominant mode of inheritance with variable penetrance.