Tayfun Altinok

Increased P‐Wave Duration and P‐Wave Dispersion in Patients with Aortic Stenosis

Background: P‐wave dispersion (PWD), defined as the difference between the maximum and minimum P‐wave duration, has been proposed as being useful for the prediction of paroxysmal atrial fibrillation (AF). AF is the most common arrhythmia and an important prognostic indicator for clinical deterioration in patients with aortic stenosis (AS). The aim of the present study was to evaluate PWD in patients with AS.

The role of MRS in the differentiation of benign and malignant soft tissue and bone tumors

OBJECTIVE The aim of our study was to investigate the value of choline in the discrimination of benign and malignant soft tissue and bone tumors. MATERIALS AND METHODS The study group consisted of thirty subjects with bone or soft tissue tumors larger than 1.5 cm in diameter. The experiments were performed in a 1.5T MR scanner. Coils were selected according to specific locations. A single-voxel MRS was performed for three different TE (time to echo) (31, 136, 272 ms). The volume of interest was positioned on the brightest enhancement. The presence of a cholin peak on at least 2 of these spectrums was considered as the marker of malignancy. The sensitivity, specificity and accuracy of the MRS in the detection and diagnosis of malignant lesions were calculated. The reproducibility of MRS and histopathological results were tested with kappa statistics. RESULTS Histopathologically, 18 (60%) of the lesions were classed as malignant whereas 12 (40%) were classed as benign. With MRS, 15 (50%) of these lesions were classed as malignant and 15 (50%) as benign. Two patients who were found spectroscopically to have malignant tumors were shown histopathologically to have benign types. Five patients with an MRS showing a benign type were classed with malignant types in histopathological examinations. MRS had a sensitivity rate of 72.2%, specificity of 83.3%, and an accuracy rate of 76.6% in detecting malignant bone and soft tissue tumors. The interrater reliability of both techniques had a kappa value of 0.533. CONCLUSIONS MRS may help in the differentiation of benign and malignant soft tissue and bone tumors.

Giant axonal neuropathy: MRS findings.

Giant axonal neuropathy (GAN) is a rare genetic disease of childhood involving the central and peripheral nervous systems. Axonal loss with several giant axons filled with neurofilaments is the main histopathological feature of peripheral nerve biopsies in this disease. Routine neuroimaging studies reveal diffuse hyperintensities in cerebral and cerebellar white matter. In this case report, the authors present the brain magnetic resonance spectroscopic features (normal N‐acetylaspartate/creatine and increased choline/creatine and myoinositol/creatine ratios), which might indicate the absence of neuroaxonal loss and the presence of significant demyelination and glial proliferation in white matter, of an 11‐year‐old boy diagnosed with GAN.

Temporary and Permanent Inferior Vena Cava Filter Combination in a Young Patient: To Implant or Not to Implant?

The decision to implant vena cava filters, either temporary or permanent, is difficult in young patients. We present the case of a young man with pulmonary embolism in whom temporary and permanent inferior vena cava filters were implanted. The decision process is discussed in relation to the current literature.

Aneurysmatic bone cyst of the second metacarpal: en-block resection and bicortical iliac crest graft replacement

Hand is an unusual location for aneurysmal bone cysts. A case in whom the second metacarpal of the left hand was presented. Because of its rapidly growing nature, a radical excision was performed. The resected segment was replaced by a bicortical iliac crest graft. The graft healed without complications, and result was functional. On the follow-up at the 36th month no sign of relapse was found.RésuméLa main est un site inhabituel pour les kystes anévrysmaux osseux. Un cas d’atteinte du 2ème métacarpien fait l’objet de notre présentation. En raison d’une croissance rapide, une résection radicale fut réalisée. La partie réséquée fut remplacée par un greffon provenant de la crête iliaque. La greffe guérit sans complications et le résultat fonctionnel fut bon. Après 36 mois aucune récidive n’a été constatée.

Pseudoaneurysm of the internal jugular vein after mumps: ultrasonographic evaluation

Abstract We report a case of pseudoaneurysm following mumps infection in the left internal jugular vein with sonography and Doppler ultrasound findings. The diagnosis was confirmed during surgical exploration. To the best of our knowledge, this is the first case report of an internal jugular vein false aneurysm in the literature.