Biomedical subjects

Tülay Ozer

Publications and source records attributed to Tülay Ozer.

15 recordsLinked to original sources

PubMed2006

Anatomic localization of the popliteal artery at the level of the knee joint: a magnetic resonance imaging study.

PURPOSE: The anatomic localization of the popliteal artery in the mediolateral plane at the level of the joint line was investigated on axial knee magnetic resonance imaging (MRI) scans to study anatomic variations. METHODS: The transverse and central axes were described on axial MRI scans of 334 knees. The distance between the popliteal artery and central axis was measured; the course of the central axis bisected the posterior cruciate ligament in almost all of the cases. The differences in popliteal artery localization according to sex and side were analyzed. RESULTS: Whereas popliteal artery localization was lateral to the central axis in 94.3% of cases, it was on the central axis in 5.7%. The popliteal artery localization was not seen on the medial side of the central axis. There was no significant effect of sex and side. CONCLUSIONS: Arthroscopic surgeons performing posterior cruciate ligament reconstruction or interventions on the posterior horns of the menisci should bear in mind that the risk of arterial complication may be greater for cases having the popliteal artery on the central axis. In conclusion, preoperative evaluation of the popliteal artery with MR axial scans, especially in pericapsular arthroscopic procedures, may prevent popliteal artery injuries. LEVEL OF EVIDENCE: Level III, diagnostic study of nonconsecutive patients.

Adolescent↗

PubMed2006

Gastric wall calcification in gastric cancer relapse: case report.

We present the case of a 53-year-old male with subtotal gastrectomy and gastrojejunostomy due to gastric cancer who later developed cancer relapse and diffuse plaque-like calcification in the residual gastric tissue. As far as we know, this is the first case in the English literature in whom gastric tumor calcification developed one year after gastric cancer operation. We also discuss possible mechanisms of gastric wall calcification in such cases.

Adenocarcinoma↗

PubMed2005

Evaluation of carotid artery wall thickness with high-resolution sonography in obstructive sleep apnea syndrome.

PURPOSE: An increased intima-media thickness (IMT) in the carotid arteries is a marker of generalized atherosclerosis, and it has been associated with a high risk of stroke. The aim of this study was to investigate whether patients with obstructive sleep apnea syndrome (OSAS) have an increase in atherosclerotic indicators in the carotid arteries. METHODS: We studied 30 men with severe OSAS who had an apnea-hypopnea index (AHI) of at least 20. IMT measurement and the presence of stenotic occlusive lesions in the carotid arteries (right common carotid artery [RCCA], right bulb [Rbulb], right internal carotid artery [RICA], left common carotid artery [LCCA], left bulb [Lbulb], and left internal carotid artery [LICA]) were investigated by high-resolution sonography. Results of the sonographic examinations were compared with those for a group of 20 subjects with mild OSAS (AHI <20) and 20 healthy subjects. RESULTS: The mean IMT of the carotid arteries of patients with severe OSAS was significantly higher than those of patients with mild OSAS and control subjects (RCCA 0.81 versus 0.63 versus 0.58, p <0.01; Rbulb 0.96 versus 0.87 versus 0.65, p <0.001; RICA 0.77 versus 0.69 versus 0.61, p <0.05; LCCA 0.97 versus 0.78 versus 0.67, p <0.01; Lbulb 1.01 versus 0.89 versus 0.72, p <0.01; LICA 0.91 versus 0.75 versus 0.65, p <0.001). CONCLUSIONS: This study shows that the carotid arteries' IMT is increased in patients with severe OSAS. This increase may predispose the patients to cerebrovascular disease. Additionally, the findings support the hypothesis that patients with OSAS are at risk of developing cerebrovascular disease regardless of the presence or absence of other vascular risk factors (eg, hypercholesterolemia, diabetus mellitus, and hypertension).

Adult↗

PubMed2005

Doppler evaluation of pediatric goiter: effect of mandatory iodination.

PURPOSE: The aim of this study was to evaluate the hemodynamic status of the thyroid in children with goiter after the use of iodinated dietary salt for 3 years in a region of endemic iodine deficiency. METHODS: Sixty-six children between 7 and 12 years of age were included in the study. Three groups were constituted according to sonographically measured thyroid volume and urinary iodine excretion levels. Group 1 included 11 children with thyroid volumes greater than the 97th percentile according to age and sex criteria suggested by the World Health Organization International Council for Control of Iodine Deficiency Disorders and urinary iodine level lower than 100 microg/l. Group 2 included 30 children with thyroid volumes greater than the 97th percentile and urinary iodine level equal to or higher than 100 microg/l. The control group included 25 children who had normal thyroid volume and urinary iodine level. All children were examined by thyroid duplex sonography. Peak systolic velocity (PSV) and resistance index (RI) were measured in the inferior thyroid artery bilaterally. RESULTS: PSV in group 1 was significantly higher than in group 2 and in the control group (P < 0.05 and P < 0.01, respectively). There was no significant difference between the PSV of group 2 and the control group. The RI in groups 1 and 2 was significantly lower than in the control group (P < 0.01 and P < 0.01, respectively). There was no significant difference between the RIs of group 1 and group 2. CONCLUSIONS: These findings suggest an effect of iodination on thyroid hemodynamics before the size of the hyperplastic thyroid returned to normal, in keeping with normalization of the urinary iodine level.

Child↗

PubMed2005

The posterior lumbar dural depth: an ultrasonographic study in children.

Lumbar puncture or identification of the epidural space is technically more difficult in children. Prior obtained information regarding the distance from skin to the dura mater may be useful as leading to an increase in success. We studied the anatomy of the posterior lumbar spine at the L4-5 intervertebral space in 137 children, using ultrasonography. Children aged between 7 and 12 years in whom weight and height are in 3-97 percentiles (recommended for healthy Turkish boys and girls) were investigated. The measured distance from skin to dura mater was found significantly higher in girls (2.59+/-0.44 cm) than boys (2.43+/-0.46 cm) (p<0.05). Prediction of the posterior dural depth at L4-5 level was obtained using single linear regression equation. All demographic variables correlated significantly with the dural depth in both sexes. In girls the skin-duramater distance achieved highest correlation ranks with weight and body surface area (BSA): 'dural depth' (cm)=1.094+[0.048 x weight (kg)], r=0.79, p<0.01 and 'dural depth' (cm)=0.337+[2.119xBSA m2], r=0.76, p<0.01). We concluded that the distance between the skin and the dura mater at the level of L4-5 interspace could be predicted using a statistical model based on the age, weight, height or BSA of children aged between 7-12 years old.

Anesthesia, Spinal↗

PubMed2005

Three-dimensional CT of Eagle's syndrome.

This case report presents three-dimensional computed tomography (3D-CT) findings in the diagnosis of Eagle's syndrome that is characterized with an elongated styloid process or a calcified stylohyoid ligament causing craniofacial or cervical pain. We have performed 3D-CT in three patients suspected to have this condition. Coronal images were taken in two patients and axial images in one patient with a spiral CT scanner. 3D-CT images were then produced. The length of the styloid process in the case suspected of right elongated styloid process was 45.6 mm (left styloid process, 37 mm). In the second case suspected of left elongated styloid process, the length of the left styloid process was 41.1 mm (right styloid process, 40.2 mm). In the last case suspected of right elongated styloid process, the length of the right styloid process was 40.6 mm (left styloid process, 38.9 mm). 3D-CT is a valuable diagnostic tool in the diagnosis of Eagle's syndrome because of its ability to facilitate accurate measurement of the length of the styloid process.

Adult↗

PubMed2005

Radiologic findings of a congenital suprasternal dermoid cyst.

A congenital cystic mass was detected at the suprasternal notch of a seven-month-old male infant. After radiologic examinations including ultrasonography, computed tomography, and magnetic resonance imaging, the cyst was excised and diagnosed as a dermoid cyst. Dermoid cysts of the head and neck are rare lesions, but a midline location is characteristic for these congenital masses. To our knowledge, only two reports have been published, which were similar to our case in localization. Dermoid cysts should be included in the differential diagnosis of midline cysts.

Dermoid Cyst↗

PubMed2004

Migration of an intrauterine contraceptive device to the ovary.

We present the case of a 37-year-old woman with a history of 2 consecutive insertions of intrauterine contraceptive devices (IUDs) 3 years before she was referred to us for sonographic evaluation of lower abdominal pain. The first of the IUDs was presumed to have been expelled spontaneously, and 3 months after insertion of the second device, the patient had begun experiencing lower abdominal pain. Medical treatment with antibiotics and spasmolytics had been unsuccessful. We performed transvaginal sonography, which revealed the presence of an IUD in the uterus and a 2-cm linear metallic echogenic area in the left ovary, believed to represent another IUD. Anteroposterior radiography confirmed that there were 2 IUDs in the pelvis, and CT demonstrated 1 IUD in the uterus and another in the left ovary. The patient underwent laparoscopic removal of the ovarian IUD and was discharged in good condition. To our knowledge, this is the first report of migration of an IUD to the ovary detected on transvaginal sonography. We recommend consideration of this possibility during evaluation of women with unexplained chronic pelvic pain.

Abdominal Pain↗

PubMed2004

Comparison of chest radiography and high-resolution computed tomography findings in early and low-grade coal worker's pneumoconiosis.

INTRODUCTION: High-resolution computed tomography (HRCT) is more sensitive than chest X-ray (CXR) in the depiction of parenchymal abnormalities. We aimed to present and compare CXR and HRCT findings in coal workers with and without early and low-grade coal worker's pneumoconiosis (CWP). MATERIALS AND METHODS: 71 coal workers were enrolled in this study. All workers were male. The CXR and HRCT of those workers were obtained and graded by two trained readers. HRCT's were graded according to Hosoda and Shida's Japanese classification. After grading, 67 workers with CXR profusion 0/0-2/2 were included in the study. Four patients with major opacity were excluded. Profusion 0/1 to 1/1 cases were accepted as early and profusion 1/2 and 2/2 cases as low-grade pneumoconiosis. RESULTS: Discordance between CXR and HRCT was high. Discordance rate was found higher in the early pneumoconiosis cases with negative CXR than low-grade pneumoconiosis (60, 36 and 8%, respectively). When coal miners with normal CXR were evaluated by HRCT, six out of 10 cases were diagnosed as positive. In low-grade pneumoconiosis group, the number of patients with positive CXR but negative HRCT were low in comparison to patients with CXR negative and early pneumoconiosis findings. Most of the CXR category 0 patients (10/16) were diagnosed as category 1 by HRCT. Eleven cases diagnosed as CXR category 1 were diagnosed as category 0 (7/11) and category 2 (4/11) by HRCT. In CXR category 2 (eight cases), there were four cases diagnosed as category 1 by HRCT. CONCLUSIONS: Discordance between CXR and HRCT was high, especially for CXR negative and early pneumoconiosis cases. The role of CXR in screening coal workers to detect early pneumoconiosis findings should be questioned. We suggest using HRCT as a standard screening method instead of CXR to distinguish between normal and early pneumoconiosis.

Adult↗

PubMed2004

Effect of iodine supplementation on goiter prevalence among the pediatric population in a severely iodine deficient area.

We evaluated goiter status and urinary iodine excretion (UIC) of 304 school-children (7-12 years old) 3 years after a law was passed for mandatory production of iodinated salt in an area previously characterized by severe iodine deficiency in Zonguldak, a mountainous city in the West Black Sea region in Turkey. We examined all the children for goiter by palpation, measured sonographic thyroid volumes (STV) and UIC. Eighty-two percent of families had been using iodinated salt. UIC was above 100 microg/l in 71.2% of the children and median UIC was sufficient (143.5 microg/l). The prevalence of goiter was lower at ultrasound (14.6%) than by palpation (19.4%). Median STV values were within recommended normal limits at all ages. Although Zonguldak had been a highly endemic region, it became mildly endemic 3 years after mandatory iodination of salt, with decrease of goiter prevalence.

Child↗

PubMed2004

A thoracic-epidural granulocytic sarcoma case that was diagnosed preceding the onset of and that recurred co-incidental to acute promyelocytic leukemia, which developed after surgical treatment.

Granulocytic sarcoma or chloroma is a tumor seen in myelocytic leukemia. Spinal epidural onset is rare and is generally seen before or together with the onset of myelocytic leukemia. An epidural mass located at the 2nd-5th thoracic levels in an 18-year-old male patient was pathologically diagnosed as granulocytic sarcoma. Radiotherapy was performed after surgical intervention. Ten months later, he was re-admitted with abdominal pain. At this time, an epidural mass at the 6th-9th thoracic levels was detected on magnetic resonance imaging, and acute promyelocytic leukemia was diagnosed. After systemic chemotherapy, partial remission was achieved. We aimed to present this rare case with its remarkable follow-up findings.

Adolescent↗

PubMed2004

[Evaluation of early hemodynamic changes in the carotid arteries after permanent pacemaker implantation with color Doppler US].

PURPOSE: Both carotid arteries of the patients were examined with color Doppler ultrasonography before and after the placement of a permanent pacemaker, and the results were discussed. MATERIALS AND METHODS: Twelve patients with pacemaker indication aged between 19-81 years were included in the study. The day before and after pacemaker implantation, maximum systolic velocity, end diastolic velocity, mean velocity, resistivity index and pulsatility index of the bilateral carotid arteries were measured. Area measuring and flow volume were calculated by using the transverse imaging of the same points of carotid arteries. Statistical analysis of the data was made with paired samples t-test. RESULTS: Heart rates of the patients were statistically higher before pacemaker implantation (p<0.001). Maximum systolic velocity of bilateral common carotid arteries, left internal carotid artery and right internal carotid artery decreased significantly after pacemaker implantation (respectively p<0.01, p<0.01, and p<0.05). We also found prominent decrease in maximum systolic velocity of both external carotid arteries after pacemaker implantation (p<0.05). End diastolic velocity, mean velocity, area and the flow volume of the carotid arteries did not change markedly. Resistivity and pulsatility index values of bilateral common and internal carotid arteries decreased significantly after pacemaker implantation (p<0.05). CONCLUSION: Decrease in maximum systolic velocity of the carotid arteries after pacemaker implantation may be due to the possible reduction in cardiac output or the treatment of bradycardia. However, flow volumes of the carotid arteries did not change after pacemaker and we concluded that the early neurological dysfunction would not be associated with the functional failure of the carotid arteries.

Adult↗

PubMed2004

[3D-CT investigation of craniofacial and cervical spine anomalies in congenital muscular torticollis].

PURPOSE: To investigate the accompanied craniofacial and cervical spine anomalies in congenital muscular torticollis (CMT) with three-dimensional computerized tomography (3D-CT). MATERIALS AND METHODS: We examined six cases of CMT. Cranial and cervical 3D CT was performed in all cases. Facial midline deviation angle (FDA), upper hemifacial width, lower hemifacial width (LHFW), length of hemimandible and zygomatic arcus, posterior hemicranial width (PHCW), anterior hemicranial width and cranial base midline deviation angle (CBDA) were measured on cranial 3D-CT images. Value of orbital index was calculated. Data achieved both ipsilaterally and contralaterally were compared with paired t-test. Atlanto-axial rotation angle (AARA) and atlantodental interval (ADI) values were measured on cervical 3D-CT images. RESULTS: Ages ranged between 2-26 years with a M/F ratio of 1/5. Facial asymmetry was diagnosed in all cases and LHFW was significantly undersized when compared to contralateral side (p < 0.05). FDA was measured 5.4+/-2.0 degrees on the average. Zygomatic arcus and hemimandible were significantly undersized on the side of torticollis (p < 0.05). Occipital plagiocephaly existed in all cases and PHCW was significantly extensive on torticollis side (p < 0.05). CBDA was measured 4.5+/-1.7 degrees on the average. Rotational movement of atlas over axis was observed in all cases where the AARA was 15.0+/-7.4 degrees. ADI was lesser than 3 mm in all cases. CONCLUSION: Even occipital plagiocephaly, maxillary and orbital deformity were commonly found in cases of CMT, most dominant asymmetry was observed in lower hemifacial region, zygomatic arcus and mandible by 3D-CT imaging. Rotational movement of first cervical vertebra over the second one was determined in all cases.

Adolescent↗

PubMed2003

Pseudoaneurysm of the dorsalis pedis artery: color Doppler sonographic and angiographic findings.

Pseudoaneurysm of the dorsalis pedis artery is an uncommon condition that is usually caused by a traumatic injury or an iatrogenic intervention. The patient usually complains of an enlarging painless, pulsatile mass. A tentative diagnosis may be made by palpation of the pulsatile mass and detection of an associated systolic bruit. Color Doppler sonographic and arteriographic examinations can be used to confirm the diagnosis. We report the case of a 17-year-old patient with a posttraumatic pseudoaneurysm of the dorsalis pedis artery. Sonographic examinations revealed pulsatile flow into and out of a cystic structure surrounded by a thick hypoechoic wall and a "to-and-fro" pattern in the neck of the vascular mass; these findings were consistent with the diagnosis of a pseudoaneurysm. Angiography confirmed the diagnosis. The patient was treated with ligation of the artery and resection of the pseudoaneurysm. He recovered well after surgery and remained free of symptoms 3 months postoperatively. We believe that color Doppler sonography should be the procedure of choice for use in diagnosing pseudoaneurysms; arteriography can then be used to evaluate the alternative blood supply before surgery is undertaken.

Adolescent↗

PubMed2003

[Comparison of three-dimensional gradient echo, turbo spin echo and steady-state gradient echo sequences in axial MRI examination of the cervical spine].

PURPOSE: The aim of this study was to assess the detectability of the structures that are affected by cervical spondylosis by different 3D MRI sequences and compare the image quality of those sequences. MATERIALS AND METHODS: Twenty healthy volunteers were examined using a 1.5 T MR unit. T2* weighted 3D-gradient echo sequence with magnetization transfer saturation pulse (3D-FFE-MTC), T2 weighted 3D turbo spin echo (TSE) sequence with and without spectral presaturation inversion recovery pulse (T2-3D-TSE/SPIR+ and T2-3D-TSE/SPIR-) and balanced-FFE (b-FFE) sequences were compared. Spinal cord signal-to-noise ratio (SNR), cerebrospinal fluid (CSF) SNR, and CSF-spinal cord contrast-to-noise ratio (CNR) were calculated quantitatively. The detectability of neural foramina, spinal nerve roots, uncinate process and ligamentum flava were graded on a 5-point scale (0: minimum, 4: maximum) qualitatively. The presence of the artifacts and overall image quality were graded on a 4-point scale (0: minimum, 3: maximum). RESULTS: Balanced-FFE sequence yielded the best results for each of three quantitative evaluation. In terms of qualitative evaluation, for the uncinate process T2-3D-TSE/SPIR- sequence was superior to the other three sequences (p < 0.01). For the ligamentum flava T2-3D-TSE/SPIR- and b-FFE sequences were superior to the other two (p < 0.01). For the neural foramina b-FFE yielded the lowest score (3), however the other three sequences were not significantly different (3.2-3.5) (p > 0.05). Artifacts were most commonly seen using 3D-FFE-MTC. In terms of overall image quality T2-3D-TSE/SPIR- yielded the highest score, followed by b-FFE. CONCLUSION: 3D-FFE-MTC sequence is frequently preferred for cervical spinal MRI studies. However our study yielded best scores for T2-3D-TSE/SPIR, followed by b-FFE in the quantitative and qualitative evaluation of the structures affected by cervical spondylosis.

Adolescent↗