Publications by authors named "Turker Dalkilic"

10 Publications

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Sarcopenia, but not frailty, predicts early mortality and adverse events after emergent surgery for metastatic disease of the spine.

Spine J 2020 01 1;20(1):22-31. Epub 2019 Sep 1.

Vancouver General Hospital, Vancouver Spine Surgery Institute, 818 west 10th Avenue, Vancouver, British Columbia, V5Z 1M9 Canada.

Background Context: Frailty and sarcopenia variably predict adverse events (AEs) in a number of surgical populations.

Purpose: The aim of this study was to investigate the ability of frailty and sarcopenia to independently predict early mortality and AEs following urgent surgery for metastatic disease of the spine.

Study Design: A single institution, retrospective cohort study.

Patient Sample: One hundred eight patients undergoing urgent surgery for spinal metastases from 2009 to 2015.

Outcome Measures: The incidence of AEs including 1- and 3-month mortality.

Methods: Sarcopenia was defined using the L3 Total Psoas Area/Vertebral body Area (L3-TPA/VB) technique on CT. The modified Frailty Index (mFI), Metastatic Frailty Index (MSTFI) and the Bollen prognostic scales were calculated for each patient. Additional data included demographics, tumor type and burden, neurological status, the extent of surgical treatment and the use of radiation-therapy. Spearman correlation test, logistic regression and Kaplan-Meier were used to study the relation between the outcomes measures and potential predictors (L3-TPA/VB, MSTFI, mFI, and the Bollen prognostic scales).

Results: Eighty-five percent of patients had at least one acute AE. Sarcopenia predicted the occurrence of at least one postop AE (L3-TPA/VB, 1.07±0.40 vs. 1.25±0.52; p=.031). Sarcopenia (L3-TPA/VB) and the degree of neurological impairment were predictive of postoperative AE but MFI or MSTFI were not. Sarcopenia predicted 3-month mortality, independent of primary tumor type (L3-TPA/VB: 0.86±0.27 vs. 1.12±0.41; p<.001). Kaplan-Meyer analysis showed L3-TPA/VB and the Bollen Scale to significantly discriminate patient survival.

Conclusions: Sarcopenia, easily measured by the L3-TPA/VB on conventional CT, predicts both early postoperative mortality and adverse events in patients undergoing urgent surgery for spinal metastasis, thus providing a practical tool for timely therapeutic decision-making in this complex patient population.
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http://dx.doi.org/10.1016/j.spinee.2019.08.012DOI Listing
January 2020

Predicting Injury Severity and Neurological Recovery after Acute Cervical Spinal Cord Injury: A Comparison of Cerebrospinal Fluid and Magnetic Resonance Imaging Biomarkers.

J Neurotrauma 2018 02 6;35(3):435-445. Epub 2017 Nov 6.

3 International Collaboration on Repair Discoveries (ICORD), University of British Columbia , Blusson Spinal Cord Center, Vancouver, British Columbia, Canada .

Biomarkers of acute human spinal cord injury (SCI) could provide a more objective measure of spinal cord damage and a better predictor of neurological outcome than current standardized neurological assessments. In SCI, there is growing interest in establishing biomarkers from cerebrospinal fluid (CSF) and from magnetic resonance imaging (MRI). Here, we compared the ability of CSF and MRI biomarkers to classify injury severity and predict neurological recovery in a cohort of acute cervical SCI patients. CSF samples and MRI scans from 36 acute cervical SCI patients were examined. From the CSF samples taken 24 h post-injury, the concentrations of inflammatory cytokines (interleukin [IL]-6, IL-8, monocyte chemotactic protein-1), and structural proteins (tau, glial fibrillary acidic protein, and S100β) were measured. From the pre-operative MRI scans, we measured intramedullary lesion length, hematoma length, hematoma extent, CSF effacement, cord expansion, and maximal spinal cord compression. Baseline and 6-month post-injury assessments of American Spine Injury Association Impairment Scale (AIS) grade and motor score were conducted. Both MRI measures and CSF biomarker levels were found to correlate with baseline injury grade, and in combination they provided a stronger model for classifying baseline AIS grade than CSF or MRI biomarkers alone. For predicting neurological recovery, the inflammatory CSF biomarkers best predicted AIS grade conversion, whereas structural biomarker levels best predicted motor score improvement. A logistic regression model utilizing CSF biomarkers alone had a 91.2% accuracy at predicting AIS conversion, and was not strengthened by adding MRI features or even knowledge of the baseline AIS grade. In a direct comparison of MRI and CSF biomarkers, the CSF biomarkers discriminate better between different injury severities, and are stronger predictors of neurological recovery in terms of AIS grade and motor score improvement. These findings demonstrate the utility of measuring the acute biological responses to SCI as biomarkers of injury severity and neurological prognosis.
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http://dx.doi.org/10.1089/neu.2017.5357DOI Listing
February 2018

Risk factors for recurrent shunt infections in children.

J Clin Neurosci 2012 Jun 18;19(6):844-8. Epub 2012 Apr 18.

Department of Neurosurgery, Sisli Etfal Training and Research Hospital, Halaskargazi Street, Istanbul 34100, Turkey.

Risk factors for recurrent shunt-related cerebrospinal fluid (CSF) infections were analyzed. A total of 58 children were treated for initial shunt infections (ISI): all children were treated with antibiotics and CSF drainage, either by removal of the shunt system and insertion of an external ventricular drainage (EVD) catheter (44 children, 75.9%) or by externalization of the existing ventricular catheter (14 children, 24.1%). Recurrent shunt infections (RSI) were detected in 15 children: nine had been treated with shunt removal and insertion of a new EVD catheter and six had been treated with externalization of the existing ventricular catheter. There was a statistically significant increase in the number of RSI in children treated with externalization of the existing ventricular catheter. Thus, to reduce the risk of RSI, total shunt removal and insertion of a new EVD catheter is preferred.
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http://dx.doi.org/10.1016/j.jocn.2011.07.054DOI Listing
June 2012

Sacroplasty: report of three cases.

Turk Neurosurg 2010 Jul;20(3):418-22

Umraniye Training and Research Hospital, Neurosurgery Clinic, Istanbul, Turkey.

Aim: Sacral stress fractures are rare fractures presenting themselves with low back and groin pain. These fractures can be treated effectively using sacroplasty.

Material And Methods: The clinical and radiological data of three cases that underwent sacroplasty for sacral stress fractures were reviewed. The pain severity was assessed using the VAS system. The radiological investigation was performed using sacral CT and MRI.

Results: The sacroplasty procedure was performed in three female cases with sacral stress fractures resistant to conservative treatment. There was history of minor trauma in all cases. The diagnosis was performed using CT and MRI. The sacroplasty procedure was performed using the short-axis technique. The preoperative VAS score reduced from 8.5 to 2.3 postoperatively.

Conclusion: It is concluded that sacroplasty is an effective and safe procedure in the treatment of the sacral stress fractures.
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http://dx.doi.org/10.5137/1019-5149.JTN.2676-09.3DOI Listing
July 2010

Sacroiliac joint dysfunction.

Turk Neurosurg 2010 Jul;20(3):398-401

Istanbul Medipol Hospital, Department of Neurosurgery, Istanbul, Turkey.

Aim: Sacroiliac joint dysfunction is a disorder presenting with low back and groin pain. It should be taken into consideration during the preoperative differential diagnosis of lumbar disc herniation, lumbar spinal stenosis and facet syndrome.

Material And Methods: Four cases with sacroiliac dysfunction are presented. The clinical and radiological signs supported the evidence of sacroiliac dysfunction, and exact diagnosis was made after positive response to sacroiliac joint block.

Results: A percutaneous sacroiliac fixation provided pain relief in all cases. The mean VAS scores reduced from 8.2 to 2.2.

Conclusion: It is concluded that sacroiliac joint dysfunction diagnosis requires a careful physical examination of the sacroiliac joints in all cases with low back and groin pain. The diagnosis is made based on positive response to the sacroiliac block. Sacroiliac fixation was found to be effective in carefully selected cases.
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http://dx.doi.org/10.5137/1019-5149.JTN.2612-09.2DOI Listing
July 2010

Pigmented villonodular synovitis of a lumbar intervertebral facet joint.

Spine J 2009 Aug 20;9(8):e6-9. Epub 2009 Mar 20.

Neurosurgery Clinic, Sişli Etfal Education and Research Hospital, Istanbul, Turkey.

Background Context: Pigmented villonodular synovitis (PVNS) is a slowly progressive lesion of uncertain etiology that involves the synovial membrane of joints or tendon sheaths. Only rarely does PVNS affect the axial skeleton, where it arises from the vertebral articular facet joint. Its treatment and prognosis remains limited.

Purpose: To describe our management in a patient with PVNS and to review previously published cases.

Study Design: Case report.

Methods: This is a case report of a 59-year-old woman who presented left sciatica. Computed tomography (CT) imaging revealed a mixed sclerotic and lucent lesion affecting the left L4-L5 facet joint. Magnetic resonance imaging (MRI) demonstrated a diffusely infiltrative process that originated from the left inferior articular process of L4 vertebra with extension into the spinal canal. A total synovectomy with left L4 hemilaminectomy was performed. Left L5 root was decompressed with total microscopic tumor removal. Decompression of spinal canal and absence of the tumor was shown by MRI and CT scan after the operation.

Results: Complete resolution of the patient's complaints was achieved. Histopathological analysis was consistent with a diagnosis of PVNS.

Conclusions: The principle of surgical management of spinal lesions causing neurologic deficit is early surgical decompression. It is also important to totally remove the synovium, the origin of PVNS, to prevent the recurrence.
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http://dx.doi.org/10.1016/j.spinee.2008.12.010DOI Listing
August 2009

Intramedullary spinal cord metastasis: a rare and devastating complication of cancer--two case reports.

Neurol Med Chir (Tokyo) 2003 Dec;43(12):612-5

Department of Neurosurgery, Sişli Etfal Hospital, Istanbul, Turkey.

Two cases of very rare intramedullary spinal cord metastasis from colon carcinoma and renal carcinoma were treated primarily by microsurgical excision. A 44-year-old female presented with colon carcinoma metastasis manifesting as complete neurological deficit. She had undergone colon resection 2 years previously for colon carcinoma. The tumor was excised by microsurgery with megadose steroid therapy but she remained paraplegic. A 43-year-old man presented with renal carcinoma metastasis manifesting as incomplete neurological deficits. He had undergone nephrectomy one year previously for renal carcinoma. The tumor was removed by microsurgery. He made a remarkable neurological recovery and became ambulatory after physical therapy.
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http://dx.doi.org/10.2176/nmc.43.612DOI Listing
December 2003

Removal of an anterior spinal dermoid cyst with fenestra corpectomy in Klippel-Feil syndrome: technical case report.

Neurosurgery 2003 Nov;53(5):1230-3; discussion 1233-4

Department of Neurosurgery, Sişli Etfal State Hospital, Istanbul, Turkey.

Objective And Importance: A spinal cord tumor occurring in association with Klippel-Feil syndrome is quite rare. The removal of an anteriorly located spinal cord tumor at the level of block vertebrae creates a surgical challenge.

Clinical Presentation: A case of an intradural extramedullary dermoid cyst located anterior to the spinal cord and a syringomyelic cavity at the level of block vertebrae in a 43-year-old woman with Klippel-Feil syndrome is presented. She experienced pain and numbness in both shoulders and in her neck, and she had a slight weakness in both arms before the operation. Her weakness and the clinical symptoms completely disappeared after the operation, and the resolution of the syringomyelic cavity was observed at control magnetic resonance imaging.

Intervention: An anterior approach creating a fenestra corpectomy to the block vertebrae was performed, and the tumor was removed totally. No fusion or fixation was performed.

Conclusion: To our knowledge, this is the first report of an anteriorly located intradural extramedullary cervical spine tumor in association with Klippel-Feil syndrome treated with this surgical technique. A three-dimensional computed tomographic control scan obtained 1 year after the operation did not show any instability.
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http://dx.doi.org/10.1227/01.neu.0000089484.70993.d1DOI Listing
November 2003

The effects on prognosis of surgical treatment of hypertensive putaminal hematomas through transsylvian transinsular approach.

Surg Neurol 2003 Mar;59(3):176-83; discussion 183

Department of Neurosurgery, Sişli Etfal State Hospital, Göktürk Cad., Samat apt No: 46/14, Göktürk/Kemerburgaz, Istanbul, Turkey

Objective: Hypertensive putaminal hematoma (HPH) is a devastating type of stroke that mostly results in death or severe neurologic deficit. There seems to be no general agreement on the selection of treatment modality for individual patients. In this study a comparison has been made between conservative treatment and the results of surgical treatment through the transsylvian transinsular approach of HPH with 30 cc or more.

Methods: Sixty-six patients with 30 cc volume or over of HPH, who were admitted within 36 hours after ictus, have been included in this study. Selection of the patients was made primarily according to the computerized tomography scan (CT) findings on admission. Out of the 66 patients, 47 were operated for hematoma evacuation through transsylvian transinsular approach, and the remaining 19 were accepted as a control group to be treated conservatively after their relatives declined authorization for surgery. All patients' neurologic grades and CT findings on admission were classified according to the hypertensive intracerebral hemorrhage grading system, as proposed by the cooperative study in Japan. After 6 months the outcomes of both groups were assessed according to the Glasgow outcome scale (GOS).

Results: The statistical difference between the mortality rates was considerable (p < 0.05) with ratios of 34% and 63.1% in the surgically and conservatively treated groups, respectively. Good recovery, that is GOS score 5, was not observed in either group. In the group of surgically treated patients, 27.7% was eventually moderately disabled (GOS score 4); whereas this ratio was 5.3% among the conservatively treated group, giving a statistically significant difference (p < 0.05). Our results indicate that neurologic grades and CT findings on admission are good predictors of outcome, as the grades increase the outcome worsens. Furthermore, ventricular spread of hematoma is not a good prognostic factor.

Conclusions: Surgical treatment via transsylvian transinsular approach of HPH with a volume of 30 cc or more results in improved outcome as compared to conservative treatment. Operation time within the first 36 hours after ictus did not affect the outcome.
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http://dx.doi.org/10.1016/s0090-3019(02)01043-1DOI Listing
March 2003

MRI reveals reversible lesions resembling posterior reversible encephalopathy in porphyria.

Neuroradiology 2002 Oct 5;44(10):839-41. Epub 2002 Sep 5.

Department of Neurology, Sisli Etfal Education and Research Hospital, Sisli Etfal S., Sisli, Istanbul, Turkey,

We report a 20-year-old woman who had an attack of acute intermittent porphyria with seizures, hallucinations, autonomic and somatic neuropathy. T2-weighted MRI revealed multiple lesions which were no longer visible 3 months later. We suggest a similar mechanism to posterior reversible encephalopathy underlying cerebral symptoms in porphyria.
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http://dx.doi.org/10.1007/s00234-002-0823-xDOI Listing
October 2002