Publications by authors named "Mustafa O Ulu"

Aim: To retrospectively analyze the results obtained from the posterior-only approach in non-pathological traumatic thoracolumbar body fractures with spinal cord compression.

Material And Methods: A total of 17 patients with traumatic non-pathological thoracolumbar fractures were included in the study. Demographic details include preoperative data such as neurological status, deformity, pain scores, and radiology; intraoperative data such as blood loss, duration of surgery, and complications, and postoperative data including the neurologic status; the duration of hospital stay, pain scores, and deformity correction were analyzed.

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Purpose: The surgical treatment of spinal metastases is mostly palliative in nature and focuses on improving the quality of life of patients. The posterior transpedicular surgical approach provides circumferential 360° decompression, allows reconstruction and stabilisation to be achieved in a single session and can be performed using an open, mini-open or minimally invasive approach. We present and discuss the surgical techniques and outcomes for patients with single-level metastatic spinal disease and in poor general condition who underwent surgery via the posterior-only transpedicular corpectomy approach and reconstruction with expandable corpectomy cages.

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This study aimed to investigate ultrastructural synaptic alterations in rat hippocampus after in utero exposure to irradiation (IR) and postnatal exposure to hyperthermia (HT). There were four groups in each of the time points (3 and 6 months). IR group: Pregnant rats were exposed to radiation on the 17 gestational day.

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Background: Melanocytic lesions of the nervous system are thought to arise from leptomeningeal melanocytes, which are derived from neural crest and include diffuse melanocytosis, melanocytomas, and malignant melanomas. Meningeal melanocytomas are extremely rare benign lesions. The usual treatment of intradural extramedullary melanocytomas involves surgical removal through a posterior approach using a laminectomy or laminotomy.

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Despite their rare occurrence, intramedullary spinal cord tumors can cause considerable morbidity and mortality without treatment. Timing of surgery, extent of resection and selection of favorable treatment option are important considerations for a good surgical outcome. In this clinical study, we report our patient series and convey our treatment strategy.

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Aim: To demonstrate the value of special intraoperative neuromonitoring techniques for cauda equina and conus medullaris tumors (CECMT) by describing standard methods used at our center.

Material And Methods: Neurophysiological records were retrospectively reviewed for 16 patients (eight females and eight males; age range: 27â€"60 years) who underwent surgery for CECMT at our department between 2016 and 2018.

Results: Motor and/or sensorial deficits were preoperatively identified in 10 patients; no patients had bladder or sexual dysfunction.

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Background: Vascular malformations of the spinal cord are a rare and complex clinical entity and can lead to severe morbidity with progressive spinal cord symptoms if not treated properly. In early stages, the disease is characterized by slowly progressive, nonspecific symptoms, such as gait disturbance, paresthesia, diffuse sensory symptoms, and radicular pain; in the late stages, bowel and bladder incontinence, erectile dysfunction, and urinary retention may develop. In recent decades, understanding and treatment of spinal vascular malformations have improved with the evolution of diagnostic tools and treatment modalities; however, it is still difficult to manage these cases because of the complexity of the pathology.

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Aim: To compare outcomes and complications in patients with thoracic disc herniation (TDH) undergoing surgery with either the posterior or anterior approach.

Material And Methods: A total of 86 patients, with 98 symptomatic TDHs, who underwent surgery in a single institution between 2007 and 2016, were included. Overall, 68 patients were in the anterior and 18 were in the posterior group.

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Aim: To investigate the added value of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) sequences in predicting somatostatin analog (SSA) responses in patients with acromegaly.

Material And Methods: This study included 55 active acromegaly patients with macroadenoma. Mean and maximum signal intensities were measured using region of interests in T2-weighted (T2W) and DCE-MRI sequences.

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Although symptomatic thoracic disk herniation (TDH) is relatively rare, its treatment is quite difficult. Our aim is to present the outcomes and complications in patients with thoracic disk herniation treated with minimally invasive lateral transthoracic approach (LTTA). Fifty-nine consecutive patients with 69 symptomatic disk herniations that underwent minimally invasive LTTA to treat TDH between 2007 and 2016 were enrolled.

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Objective: To review the results of sphenoid sinus lateral recess (SSLR) cerebrospinal fluid (CSF) leaks treated with the endoscopic endonasal minimal transpterygoid approach (EEMTPA) and to discuss the surgical technique and outcomes.

Methods: We performed a retrospective analysis of 13 cases who underwent SSLR CSF leak repair through the EEMTPA in our clinic between September 2008 and December 2017. Demographic and etiological features with reconstruction and surgical outcomes were examined.

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Background: Osteopetrosis (OP) is a varied clinical condition caused by malfunction or insufficient development of osteoclasts, or both. Neurologic findings can occur because of osteopetrotic conditions restricting neural foramina through which the spinal cord, cranial nerves, or major vascular structures traverse the skull. Renal tubular acidosis (RTA) is a well-documented condition with OP.

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Aim: Evidence suggests an association between MMP-9 functional gene polymorphisms and several tumors. The aim of this study was to investigate the possible role of single-nucleotide polymorphisms (SNP) at MMP-9 R279Q A/G, P574R G/C and R668Q G/A and R668Q (rs17577) genotypes with glial tumors in Turkey.

Material And Methods: The present series consisted of tissue samples obtained from 100 cancer-free controls and 100 patients who had undergone glial tumor resection from 2007 to 2011 at the Cerrahpasa Medical Faculty of Istanbul University.

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Objective. Endocan has been shown to be a marker for several cancers and may show degree of malignancy. The aim of this study is to assess tissue levels of endocan in common brain tumors, namely, meningiomas, low-grade gliomas (LGGs), and high-grade gliomas (HGGs).

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Aim: Surgical indications for ophthalmic segment aneurysms are getting narrower due in part to success of endovascular techniques like flow diverters. Wide necks, large size, intraluminal thrombus, optic nerve compression or recurrence after endovascular therapy make the case for surgical treatment. Bilateral aneurysms are less established but worth considering surgical indication.

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Object: The object of this study was to delineate the microsurgical anatomy of the cisternal segment of the anterior choroidal artery (AChA). The authors also propose a new classification of this segment on the basis of its complicated course within the carotid and crural cisterns in relation to important neurovascular structures, and the site of origin, course, and areas of supply of perforating arteries.

Methods: Thirty cadaveric cerebral hemispheres injected with colored latex were dissected under surgical magnification to view the cisternal segment of the AChA and its perforators.

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Angiosarcomas are rare malignant vascular tumors that comprise only approximately 2% of all soft tissue sarcomas. They are mainly located in the head and neck area and spinal involvement is particularly very uncommon, reported only in occasional case reports or as single cases as part of a clinical series. There is therefore limited data in the literature regarding the optimum treatment strategy.

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Thoracic disc herniations are associated with serious neurological consequences if not treated appropriately. Although a number of techniques have been described, there is no consensus about the best surgical approach. In this study, the authors report their experience in the operative management of patients with thoracic disc herniations using minimally invasive lateral transthoracic trans/retropleural approach.

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Aim: In utero irradiation models induce diffuse neuronal damage. Experimental studies have shown that hyperthermia induced seizures are easily elicited and have high mortality accompanied by neuronal loss. Neuronal damage and loss are the results of cell death coupled with cortical development in altered cellular development.

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Spinal or paraspinal retained surgical sponges (gossybipoma or textiloma) are rare incidents and mostly asymptomatic in chronic cases, but can be confused with other masses such as a hematoma, an abscess or a tumor. In chronic cases, the presentation can be as late as decades after the initial surgery; however, some gossybipomas cause infection or abscess formation in the early stages. The authors report a 40-year-old woman with a history of operation for lumbar disk herniation before 8 months, and got admitted with a complaint of serous fluid leakage from the operation wound.

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Object: The authors present their experience in the surgical treatment of metopic synostosis by orbital bandeau remodeling and frontal bone rotation. The pitfalls and advantages of the surgical technique are discussed, along with the long-term clinical results in 48 consecutive cases.

Methods: Forty-eight consecutive patients in whom trigonocephaly was diagnosed between 1990 and 2009 were treated with frontal bone rotation and frontoorbital bandeau remodeling.

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A 45-year-old woman described the pain and the swelling at the left frontoparietal region. No significant findings were noted on physical examination, except a heterogeneous palpable lesion at the described region. Computed tomographic scan revealed an expansive bone lesion with homogeneous density, whereas magnetic resonance imaging revealed similar findings with no contrast enhancement.

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Arachnoid cysts (AC) located within the interhemispheric fissure are rare, frequently associated with agenesis or hypogenesis of the corpus callosum. The optimal method for surgical treatment is under debate. In this study, we retrospectively reviewed the clinical results of seven infants (five males, two females; mean age, 5.

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