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ABSTRACT: Joubert syndrome is a rare disorder characterized by hypotonia, ataxia, episodic hyperpnoea, psychomotor delay, abnormal ocular movements, and molar tooth sign on magnetic resonance imaging (MRI). This syndrome is inherited as an autosomal recessive trait, but the molecular basis and specific chromosomal locus have not yet been identified. MRI features are the most important diagnostic criteria. Molar tooth sign was previously described in Joubert syndrome and was found in 85% of patients with Joubert syndrome. Many authors now claim that this finding can be present in other syndromes, including Dekaban-Arima, Senior-Löken, COACH, and Varadi-Papp. We present a 7-month-old girl with Joubert syndrome in whom MRI showed the typical features of this condition. She also had polydactyly, atrial septal defect, and persistent left superior vena cava.
Diagnostic and interventional radiology (Ankara, Turkey) 07/2007; 13(2):94-6. · 1.10 Impact Factor
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ABSTRACT: To determine the value of magnetization transfer (MT) imaging in the evaluation of acute plaques, which cause clinical findings in the brain magnetic resonance (MR) images of patients with relapsing-remitting multiple sclerosis, and its correlation with the clinical findings.
Forty patients with relapsing-remitting multiple sclerosis were included in the study. They were being followed-up for the diagnosis of relapsing-remitting multiple sclerosis based on McDonald's criteria. To evaluate the acute plaques of the patients, their T1- weighted spin echo sequences were divided into 3 groups: precontrast and postcontrast MT images (group 1), postcontrast MT images only (group 2), and precontrast and postcontrast non-MT images (group 3). The sensitivity and positive predictive values were calculated to determine the correlation between the patients considered to have had attacks and the acute plaques detected during MR imaging examinations with T1-weighted spin echo.
After clinical examinations, in 25 of 40 patients (62.5%), there were neurological findings suggesting acute attacks. Among the 3 imaging groups, there was a significant difference in the number of acute plaques. In group 1 there were a total 30 findings suggesting acute plaques; in group 2 33; and in group 3 there were 20. When the correlation between the patients who were considered to have had attacks after their clinical examinations and the acute plaques detected with T1- weighted spin echo examinations were evaluated, the sensitivity and positive predictive values were 97% and 100% in group 1, 87% and 78% in group 2, and 65% and 100% in group 3, respectively.
In MS, T1-weighted MT examinations yield more reliable results for following up the treatment and changes in the development of the disease. They also offer a more effective evaluation of the acute plaques that cause clinical findings.
Diagnostic and interventional radiology (Ankara, Turkey) 10/2005; 11(3):137-41. · 1.10 Impact Factor
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ABSTRACT: Twenty-four patients with hypoxic-ischemic encephalopathy were examined with serial magnetic resonance imaging up to 4 years of age. Magnetic resonance imaging studies were performed in the neonatal period, at the fourth month and the fourth year of age, and the findings were compared with the patients' neurodevelopmental outcome at the fourth year of age. Periventricular signal alterations and deep gray matter involvement were usually evident in the initial magnetic resonance imaging studies, and encephalomalacia, periventricular leukomalacia, and atrophy were the common findings on follow-up magnetic resonance imaging studies. In the patients with hypoxic-ischemic encephalopathy, some correlation between magnetic resonance imaging findings and neurodevelopmental outcome was recognized. The patients with deep gray matter involvement on the initial magnetic resonance imaging had a poor prognosis, and the ones with normal magnetic resonance imaging findings had a favorable neurodevelopmental outcome. On the follow-up magnetic resonance imaging findings, encephalomalacia and periventricular leukomalacia were associated with poor neurodevelopmental outcome. In predicting the neurologic outcome at 4 years of age, magnetic resonance imaging findings of the neonatal period had the highest negative predictive value, whereas magnetic resonance imaging findings at 4 months of age and 4 years of age had the highest positive predictive value.
Pediatric Neurology 11/2004; 31(4):267-74. · 1.52 Impact Factor
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ABSTRACT: The aim of the study was to evaluate facial pain clinically and to determine the frequency with which structural lesions were diagnosed by means of magnetic resonance imaging in a sample of patients with facial pain, including refractory trigeminal neuralgia and atypical facial pain. Fifty-two patients with facial pain were examined clinically, and treatment protocols were adopted for trigeminal neuralgia and atypical facial pain. The patients with atypical symptoms and those who did not to respond to the treatment underwent magnetic resonance imaging to screen for intracranial lesions. Magnetic resonance images of 38 patients were obtained. The female-to-male ratio of the patient population was 32:20. The mean age of the patients was 57.15 +/- 11.49 years. Intracranial lesions were diagnosed in 24 patients. Ten patients had no intracranial pathoses visible on magnetic resonance images. Four patients had other pathoses that were not related to the facial pain. The most frequently observed extracranial pathologic change was sinusitis. It may not be possible to reliably identify high-risk patients for selective magnetic resonance imaging on the basis of a clinical evaluation alone. Routine magnetic resonance imaging for all patients with facial pain is recommended to exclude intracranial lesions.
Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontics 06/2004; 97(5):652-8. · 1.46 Impact Factor
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ABSTRACT: We report a case of bilateral neurogenic thoracic outlet syndrome (TOS). Electrophysiological examination suggested the presence of bilateral lower brachial plexus neuropathy. Radiography showed rudimentary bilateral cervical ribs. In the cases reported in the literature to date, the clinical findings are typically unilateral despite the common presence of bilateral bony abnormalities. Neurogenic TOS should be considered in young women, even if they present with bilateral symptoms, when they have occupations requiring strenuous activity of the upper limbs.
Muscle & Nerve 02/2004; 29(1):147-50. · 2.37 Impact Factor
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ABSTRACT: The role of computed tomography (CT) and magnetic resonance imaging (MRI) in the diagnosis of parotid tumors was investigated.
Forty patients with the clinical suspicion of a parotid mass underwent both CT and MRI of the parotid region. Two radiologists independently assessed the CT and MRI results with respect to tumor localization, tumor margin characteristics, and infiltration of surrounding tissue. Histopathologic specimens were obtained in all cases and correlated with the radiologic findings.
The sensitivity and specificity of CT and MRI were nearly the same for tumor location, tumor margin, and tumor infiltration.
The 2 imaging techniques provided the same information with respect to the presurgical planning and contribute to the diagnosis and therapy planning of parotid tumors.
Otolaryngology Head and Neck Surgery 01/2004; 129(6):726-32. · 1.72 Impact Factor
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ABSTRACT: It is often useful to know the exact volume of the liver, such as in monitoring the effects of a disease, treatment, dieting regime, training program or surgical application. Some non-invasive methodologies have been previously described which estimate the volume of the liver. However, these preliminary techniques need special software or skilled performers and they are not ideal for daily use in clinical practice. Here, we describe a simple, accurate and practical technique for estimating liver volume without changing the routine magnetic resonance imaging scanning procedure.
In this study, five normal livers, obtained from cadavers, were scanned by 0.5 T MR machine, in horizontal and sagittal planes. The consecutive sections, in 10 mm thickness, were used to estimate the whole volume of the liver by means of the Cavalieri principle. The volume estimations were done by three different performers to evaluate the reproducibility.
There are no statistical differences between the performers and real liver volumes (P > 0.05). There is also high correlation between the estimates of performers and the real liver volume (r = 0.993).
We conclude that the combination of MR imaging with the Cavalieri principle is a non-invasive, direct and unbiased technique that can be safely applied to estimate liver volume with a very moderate workload per individual.
European Journal of Radiology 08/2003; 47(2):164-70. · 2.61 Impact Factor
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ABSTRACT: Chondrodysplasia punctata is a peroxisomal disorder which is a form of multiple epiphyseal dysplasia. It is characterized by calcifications of unossified cartilaginous epiphyseal centers during the first year of life. Severe autosomal recessive rhisomelic form shows bilateral proximal shortening of the upper and lower limbs with punctate epiphyseal calcifications. We report radiological findings of a patient with rhisomelic chondrodysplasia punctata. Magnetic resonance imaging showed foramen magnum stenosis that caused spinal cord compression.
Tanısal ve girişimsel radyoloji: Tıbbi Görüntüleme ve Girişimsel Radyoloji Derneği yayın organı 04/2003; 9(1):100-3.
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ABSTRACT: Our objective was to determine the incidence of diagnosing lesions by cranial computed tomography (CT) and to evaluate prospectively whether this incidence correlated with clinical features and age in patients with minor head trauma (MHT).
This prospective study included 78 patients with MHT. All of the cases underwent CT following their clinical assessment.
In the 34.61% of cases, there was a pathologic finding in the CT however the incidence of intracranial injury was 15.38%. There were no significant differences between children (n:22) and adults (n:56), the patients with and without a history of the loss of consciousness/amnesia and the patients with and without clinical symptoms (p>0.05).
Our results support the studies which have reported that there is no non-focal clinical factor as a predictor for pathologic CT findings.
Ulusal travma ve acil cerrahi dergisi = Turkish journal of trauma & emergency surgery: TJTES 04/2003; 9(2):129-33. · 0.33 Impact Factor
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ABSTRACT: Although radiological findings of cerebral hemiatrophy (Dyke-Davidoff-Masson Syndrome) are well known, there is no systematic study about the gender and the affected side in this syndrome. Brain images in 26 patients (mean aged 11) with cerebral hemiatrophy were retrospectively reviewed. Nineteen patients (73.5%) were male and seven patients (26.5%) were female. Left hemisphere involvement was seen in 18 patients (69.2%) and right hemisphere involvement was seen in eight patients (30.8%). We conclude that male gender and left side involvement are frequent in cerebral hemiatrophy disease.
Clinical Imaging 28(3):163-5. · 0.75 Impact Factor
