The Impact of the Placement of the L5 Vertebra in Relation to the Intercrest Line on the Level of Disc Herniation.

AIM: The objective of this study is to determine whether there is a correlation between a deeply situated L5 vertebra in relation to the intercrest line and the level of degeneration of the lumbar discs. MATERIAL AND METHODS: The study comprised 152 patients who underwent surgery for lumbar disc herniation. After analyzing the radiographs, the patients were separated into two groups. The first group had an intercrest line passing via the L4 corpus, while the second group had an intercrest line passing through the L4-5 disc distance or L5 vertebra. The first group was classified as having a deeply located L5 vertebra, while the second group had a non-deeply located L5 vertebra. RESULTS: The research discovered that male patients had a significantly higher incidence of deeply located L5 vertebra when compared to female patients (p=0.003). Patients who underwent surgery at the L4-5 level exhibited disc heights that were notably higher than those who were operated upon at the L5-S1 level. In Group-1, 68% of patients had surgery at the L4-5 level, compared to only 41.7% in Group-2 (p=0.009). CONCLUSION: When investigating the effects of the position of the L5 vertebra on the intercrest line in relation to L4-5 and L5-S1 disc levels, the study found that the L5 vertebra being deeply located offered protection against L5-S1 disc herniation, while L4-5 disc herniation was more commonly observed in these patients. This is believed to be due to the L5-S1 segment being less mobile when the L5 vertebra is deeply located.

The Effect of Early Myelotomy on Glutamate Concentrations in Spinal Cord Injury Rat Model.

AIM: To evaluate the effect of early myelotomy on glutamate concentrations in injured spinal cord tissue with a weight drop spinal cord injury rat model. MATERIAL AND METHODS: The rats were assigned randomly to one of four groups, as follows: in group I, rats underwent laminectomy; group II, myelotomy was performed after laminectomy; group III, rats received contusion after laminectomy; and group IV, myelotomy was performed 1 hour after laminectomy and contusion. In order to create a spinal cord injury, a 10-g rod was dropped from a height of 50 mm onto the exposed dura at T10 level. For the myelotomy procedure, a longitudinal 1-1.5 mm depth midline incision was made to the spinal cord. Twelve hours later, rats were decapitated, and the spinal cord tissues were removed. The obtained tissues' glutamate concentrations were measured using the HPLC technique. RESULTS: The glutamate levels were significantly lower in group III than those of groups I and II. In group IV, glutamate levels were significantly high compared to group III and significantly low compared to group I. Between groups I and II, there was no statistically significant difference. CONCLUSION: This study's results suggest that early myelotomy significantly prevented glutamate depletion from the injured spinal cord. Compared to the normal spinal cord, there was still significant depletion in injured spinal cord with myelotomy because of the initial glutamate release until the myelotomy was performed. It was also concluded that myelotomy was not harmful to the spinal cord as it did not cause significant glutamate depletion.

The Trans-Spinous Crosslink Increases the Pull-Out Strength of the Pedicle Screw Instrumentation.

AIM: To evaluate whether adding an extra anchoring point to the construct by passing the crosslink through a hole in the spinous process (trans-spinous crosslink technique), may prevent screw loosening by increasing the pull-out strength. MATERIAL AND METHODS: Twenty-four fresh-frozen single lumbar sheep vertebrae were instrumented with pedicle screws bilaterally, and they are connected to each other with a crosslink. All vertebrae were assigned randomly to either the experiment (trans-spinous crosslink) group or the control group. In the experiment group, the crosslink was passed through a hole within the spinous process. In the control group, the posterior part of the hole was removed. The pull-out force of the construct was determined using a mechanical testing machine. RESULTS: The mean pull-out forces of the experiment group and the control group were 1949 ± 361.55 N and 1338.57 ± 220.26 N, respectively. The pull-out force of the experiment group was significantly higher than those of the control group with 99.9% confidence (p < 0.001). CONCLUSION: The pedicle screws rigidly anchor the internal fixation devices to the vertebral colon. In classical construct design, pedicle screws share the load. Adding extra anchoring points decreases screw share and may prevent construct pull-out. This study shows that the trans-spinous crosslink can serve as an anchoring point and increases the construct pull-out strength.

Lumbar Juxtafacet Cysts.

AIM: To evaluate the factors affecting the clinical and radiological findings of juxtafacet cyst patients. MATERIAL AND METHODS: Between January 2011 and December 2018, eight patients diagnosed with juxtafacet cyst were reviewed, retrospectively. Patient demographics; signs and symptoms; and neurological examination, radiological, and surgical findings were noted. RESULTS: The mean age was 54 years (range, 34â€"69 years) with five (62.5%) females and three (37.5%) males. There were nine juxtafacet cysts in eight patients. Five cysts (55.5%) were located at the L3â€"L4 level, two cysts (22.2%) at the L4â€"L5 level, and two cysts (22.2%) at the L5â€"S1 level. In all patients with L3â€"L4 cysts, the intercrest line was intersecting the spinal column at L4 vertebral body level. The most frequent symptoms were back pain and radiculopathy. Magnetic resonance imaging and computerized tomography revealed degenerative facet arthropathy in six patients (75%). Three patients (37.5%) had a medical history of trauma. One patient (12.5%) was treated conservatively. Seven patients (87.5%) were advised to undergo surgical treatment. CONCLUSION: Degeneration and instability are the main causes of juxtafacet cysts. They are mainly seen at the L4â€"L5 level due to higher movement capacity of this level. But, if the intercrest line intersects the spinal column at higher levels, degeneration and instability risks move to upper levels, and juxtafacet cysts may occur at the L3â€"L4 or upper levels.

Comparison of predictive powers of S100B and cell-free plasma DNA values in intensive care unit patients with intracranial hemorrhage.

PURPOSE: To investigate predictive powers of S100B and cell-free DNA (cfDNA) levels in patients in the intensive care unit (ICU) who have with intracranial hemorrhage (ICH) for prognosis. METHODS: Ninety-nine patients diagnosed with ICH were included in the study. The blood samples were drawn on the day of admittance to ICU and again on the third day. Duration of stay in the ICU and mortality were recorded. RESULTS: A positive correlation was determined between the values of S100B and cfDNA from both the analysis and the Acute Physiology and Chronic Health Evaluation II scores. For all patients, there was a positive correlation between the duration of stay in the ICU and the values of S100B and cfDNA on the third day. The levels of both S100B and cfDNA in patients who died in the ICU were significantly higher than of those who survived on the day of admittance. CONCLUSIONS: Both S100B and cfDNA values can be used as markers to predict the prognosis of ICU patients with ICH. However, S100B is more powerful for predicting the prognosis.

Ascites and abdominal pseudocyst: two uncommon ventriculoperitoneal shunt complications in two cases.

Ascites and abdominal pseudocysts (APC) are two rare complications that can occur following placement of a ventriculoperitoneal (VP) shunt. Both complications are characterized by abnormal intraperitoneal cerebrospinal fluid (CSF) collections. Although various factors have been implicated, the exact pathogenesis of the two conditions remains elusive. This paper presents two cases of VP shunt placement resulting from hydrocephaly. The first patient presented with generalized ascites and the other with APC, both of whom were six years old. APC and ascites after VP shunt placement are rare and distinct conditions; therefore, they may require different management strategies.

CSF hydrothorax: neither migration of peritoneal catheter into the chest nor ascites. Case report and review of the literature.

INTRODUCTION: Complications of ventriculoperitoneal (V/P) shunt surgery are generally due to infection, or mechanical or dynamic dysfunction. Thoracic complications like cerebrospinal fluid (CSF) hydrothorax are rarely seen. PATIENT AND METHODS: We present a CSF hydrothorax patient as a rare complication of V/P shunt surgery and review of the literature. The patient was a 7-month-old girl who had V/P shunt surgery for hydrocephalus. Six months after surgery, she was admitted to hospital with the complaint of cough. As the chest X-ray revealed hydrothorax, a chest tube was inserted. Although her shunt tip was in the abdominal cavity in shuntograms, positive beta-2 transferrin in liquid sample and Tc 99m cisternography proved that it was CSF. After we replaced her V/P shunt with a ventriculoatrial shunt, the liquid coming from the chest tube progressively diminished and disappeared, and her chest tube was removed. RESULTS: There are 36 CSF hydrothorax cases, including the present case, in the literature. There is peritoneal catheter migration into the chest in 22 of them (61.1 %). Half of the remaining 14 cases (38.9 %) without catheter migration have also CSF ascites. But, in the other half (seven cases), there is neither catheter migration nor CSF ascites as in the present case. CONCLUSION: CSF hydrothorax following V/P shunt surgery is a very rare complication that may cause serious respiratory distress. It is important to keep in mind that peritoneal catheter migration into the chest may or may not occur. Even ascites may not accompany CSF hydrothorax in a patient without peritoneal catheter migration.

Functional disability of children with spina bifida: its impact on parents' psychological status and family functioning.

OBJECTIVE: To evaluate the impact of functional disability of Turkish children with spina bifida (SB) on parents' psychological status and family functioning. METHODS: Fifty-four children with SB and parents were included. The Functional Measure for Children (WeeFIM), Beck Depression Inventory (BDI), and Family Assessment Device (FAD) were used. RESULTS: Mothers' BDI scores were significantly higher than fathers' (p < 0.001). No significant effects of the knowledge of having children with SB before birth and the number of children in families on BDI scores and FAD sub-scores were found (p > 0.05). According to multiple regression analysis; significant correlations with fathers' BDI were problem-solving (p = 0.012) and general functioning (p = 0.037) and with mothers' BDI was roles (p = 0.018). Only childrens age was found to be an influential variable on WeeFIM scores (p < 0.001). CONCLUSION: Spina bifida healthcare should include psychological support to parents of these children and this support should be independent from disability level of children.

Unusual presentation of an anterior sacral meningocele: magnetic resonance imaging, multidetector computed tomography, and fistulography findings of bacterial meningitis secondary to a rectothecal fistula.

An anterior sacral meningocele, a rare congenital anomaly, manifested in a previously healthy 44-year-old woman with findings of meningitis, including headache, vomiting, unconsciousness, and fever. Nontraumatic pneumocephalus, tetraventricular hydrocephalus, fluid-fluid level at the lateral ventricles, and pial enhancement were observed on multidetector computed tomography. A ventricular drainage catheter was placed to decompress the hydrocephalus, and drainage was performed urgently. Escherichia coli was isolated from the drainage material. Whole-spine magnetic resonance imaging and fistulography were undertaken on the third day after admission to evaluate for anal and urinary incontinence and pareses of both upper and lower extremities. Spinal arachnoiditis, tethered cord, dysgenesis of the sacrum, and a rectothecal fistula were demonstrated. Specific antibiotic treatment and surgery for fistula tract excision were performed.

The perforating branches of the P1 segment of the posterior cerebral artery.

The perforating branches of the P1 segment of the posterior cerebral artery are vulnerable to injury. Because of their close proximity to the basilar artery, the vulnerability occurs especially during surgical interventions for vascular pathologies such as basilar apex aneurysms. Therefore, extensive knowledge of the microsurgical anatomy of this area is mandatory to prevent poor post-operative outcomes. We microscopically examined 28 P1 segments obtained from 14 adult fresh cadaver brains (6 silicone injected, 8 freshly examined). The P1 segments ranged between 2.8mm and 12.2mm (mean 6.8mm) in length with a mean outer diameter of 1.85 mm (range 0.8-4.5mm). All 94 thalamoperforating branches identified in 27 P1 segments (mean 3.35 branches per segment) arose from the postero-superior aspect of P1 and were the most proximally originating branch in nearly all specimens (96.4%). In addition in 28 P1s, 12 short circumflex arteries (42.8%; mean 0.42 branches per segment), 16 long circumflex arteries (57.1%; mean 0.57 branches per segment) and 10 medial posterior choroidal arteries (35.7%; mean 0.35 branches per segment) were identified and all originated from the posterior or postero-inferior surface of the P1 segment. When the P1 segment had more than one type of branch, it was the short circumflex arteries that were always more proximal in origin than the others. The medial posterior choroidal arteries were always more distal in origin. All three branches were not observed together in any of the P1 segments. The findings in this, and future, anatomical studies may help to reduce the post-surgical morbidity and mortality rates after surgery for posterior circulation aneurysms.

There are no estrogen and progesterone receptors in cerebral cavernomas: a preliminary immunohistochemical study.

BACKGROUND: Literature consistently mentions that pregnancy and hormonal therapy probably increase the bleeding rate and seizure expression of cerebral cavernomas. Either increased hormonal activity or embryogenesis related abundant expression of some growth factors such as VEGF, bFGF, and placental growth factor during pregnancy were proposed to initiate angiogenic process and vascular proliferation in cavernomas, thereby increasing their bleeding rate and seizure expression. METHODS: To reveal whether estrogen and/or progesterone have direct effect on cerebral cavernomas, their receptor expressions were studied immunohistochemically in recently excised 12 cerebral cavernomas. RESULTS: Study showed no expression of either estrogen or progesterone receptors in cerebral cavernomas even the staining worked well in positive control tissues of infiltrative ductal carcinoma. CONCLUSIONS: Aggressive behavior of cerebral cavernomas during pregnancy is a commonly proven observation and attributed to some hormonal effects. However, this effect seems not related to effect of estrogen or progesterone on cavernoma tissue via receptor binding.