Search

Purpose: To investigate risk factors for instrumentation failure (IF) in titanium (Ti) mesh reconstruction for thoracic and lumbar tumors. Patients and Methods: The clinical data of patients with thoracic or lumbar tumors who received Ti mesh reconstruction via the posterior approach in our hospital from 2013 to 2018 were analyzed retrospectively. The observation indexes included sex, age, BMI, the vertebra resection mode, the number of resected vertebral segments, application of bone cement, radiotherapy, chemotherapy, revision or primary surgery, and primary tumor metastasis. Correlations between these factors and IF were analyzed by Kaplan–Meier survival and logistics regression analyses. Results: The 178 patients included 108 males and 70 females with a mean age of 48.09± 16.21 (6– 78) years and a mean follow-up period of 51.18 (24– 90) months. The data showed that 17 patients (9.55%) were inflicted with IF, involving the thoracic vertebra in 11 cases, thoracolumbar vertebrae (T12–L1) in 2 cases, and lumbar vertebrae in 4 cases. The mean interval between surgery to IF was 35.18± 14.17 (14– 59) months. Univariate analysis showed that total vertebral body resection, the number of resected vertebral segments, radiotherapy and multiple tumor resection were potential factors for IF, while multivariate analysis showed that only total vertebral body resection, the number of resected vertebral segments and radiotherapy were independent factors. Conclusion: Total vertebra resection, the number of resected vertebral segments (≥ 2) and radiotherapy before and after operation were significant risk factors related to IF. [ABSTRACT FROM AUTHOR]

Background: With the occurrence and improvement of immunohistochemistry and other pathological diagnostic techniques, gastrointestinal stromal tumor (GIST) has been gradually recognized. With the prolonged survival of patients with GISTs, reports about the bone metastasis of GIST increased. However, the knowledge of GISTs is rather limited due to its very low incidence. Methods: Cochrane and Medline database (via PubMed) were searched in July 2019 with related keywords to acquire the literature related to the bone metastasis of GIST. Then, the literature was reviewed and references were also scanned to identify the possible related reports. Study data comprising age, sex, primary location, metastasis interval time, immunohistochemistry index, management and prognosis were recorded and analyzed. Results: Forty-five patients with bone metastases of GIST, with a mean age of 61.09 years, were included. The small intestine and stomach were the most common primary sites, followed by the rectum. Patients with small intestine primary sites had bone metastases that occurred earlier than the bone metastases stomach and rectum primary sites. The spine was the most common site of bony metastases. The mean survival time after GIST diagnosis was more than 64.02 months. Patients younger than 60 years old had a worse prognosis than those older than 60 years old. Furthermore, patients with spinal involvement had a worse prognosis than those without spinal involvement. Surgical interventions combined with targeted therapies guaranteed a better prognosis. Conclusion: Bone metastasis of GIST, which mainly occurs in the spine, is rather rare. Patients with GISTs of the small intestine and stomach suffered from bone metastasis more frequently and earlier than patients with GISTs in other primary sites. Age, sex, primary tumor location, treatment mode for the primary lesions and metastases, and spine involvement may be potential factors that affect the prognosis of GIST patients with bone metastases. [ABSTRACT FROM AUTHOR]

Background: Most patients with breast cancer in advanced stages of the disease suffer from bone metastases which lead to fractures and nerve compression syndromes. microRNA dysregulation is an important event in the metastases of breast cancer to bone. microRNA-124 (miR-124) has been proved to inhibit cancer progression, whereas its effect on bone metastases of breast cancer has not been reported. Therefore, this study aimed to investigate the role and underlying mechanism of miR-124 in bone metastases of breast cancer. Methods: In situ hybridization (ISH) was used to detect the expression of miR-124 in breast cancer tissues and bone metastatic tissues. Ventricle injection model was constructed to explore the effect of miR-124 on bone metastasis in vivo. The function of cancer cell derived miR-124 in the differentiation of osteoclast progenitor cells was verified in vitro. Dual-luciferase reporter assay was conducted to confirm Interleukin-11 (IL-11) as a miR-124 target. The involvement of miR-124/IL-11 in the prognosis of breast cancer patients with bone metastasis was determined by Kaplan-Meier analysis. Results: Herein, we found that miR-124 was significantly reduced in metastatic bone tissues from breast cancers. Down-regulation of miR-124 was associated with aggressive clinical characteristics and shorter bone metastasis-free survival and overall survival. Restoration of miR-124 suppressed, while inhibition of miR-124 promoted the bone metastasis of breast cancer cells in vivo. At the cellular level, gain of function and loss-of function assays indicated that cancer cell-derived miR-124 inhibited the survival and differentiation of osteoclast progenitor cells. At the molecular level, we demonstrated that IL-11 partially mediated osteoclastogenesis suppression by miR-124 using in vitro and in vivo assays. Furthermore, IL-11 levels were inversely correlated with miR-124, and up-regulation IL-11 in bone metastases was associated with a poor prognosis. Conclusions: Thus, the identification of a dysregulated miR-124/IL-11 axis helps elucidate mechanisms of breast cancer metastases to bone, uncovers new prognostic markers, and facilitates the development of novel therapeutic targets to treat and even prevent bone metastases of breast cancer. [ABSTRACT FROM AUTHOR]

Giant cell tumor of the bone (GCTB) is a locally aggressive tumor with a certain distant metastatic rate. For sacral GCT (SGCT) and pelvic GCT (PGCT), surgery has its limitations, especially for unresectable or recurrent tumors. Selective arterial embolization (SAE) is reported to be an option for treatment in several cases, but there are few systematic reviews on the effects of SAE on SGCT and/or PGCT. Medline and Embase databases were searched for eligible English articles. Inclusion and exclusion criteria were conducted before searching. All the clinical factors were measured by SPSS software, with P-values ≤0.05 considered statistically significant. A total of 9 articles were retrieved, including 44 patients receiving SAE ranging from 1 to 10 times. During the mean follow-up period of 85.8 months, the radiographic response rate was 81.8%, with a local control and overall survival rate of 75% and 81.8%, respectively. No bowel, bladder, or sexual dysfunction was observed. Three patients developed distant metastases and finally died. Patients with primary tumors tended to have better prognosis than those with recurrence (P = 0.039). The favorable outcomes of SAE suggest that it may be an alternative treatment for SGCT and PGCT patients for whom surgery is not appropriate. [ABSTRACT FROM AUTHOR]

Objective To investigate the feasibility and safety of en bloc resection of cervical primary malignant bone tumors by a combined anterior and posterior approach based on a three-dimensional (3- D) printing model. Methods Five patients with primary malignant bone tumors of the cervical spine underwent en bloc resection via a one-stage combined anteroposterior approach in our hospital from March 2013 to June 2014. They comprised three men and two women of mean age 47.2 years (range, 26-67 years). Three of the tumors were chondrosarcomas and two chordomas. Preoperative 3- D printing models were created by 3- D printing technology. Sagittal en bloc resections were planned based on these models and successfully performed. A 360° reconstruction was performed by spinal instrumentation in all cases. Surgical margins, perioperative complications, local control rate and survival rate were assessed. Results All patients underwent en bloc excision via a combined posterior and anterior approach in one stage. Mean operative time and estimated blood loss were 465 minutes and 1290 mL, respectively. Mean follow-up was 21 months. Wide surgical margins were achieved in two patients and marginal resection in three; these three patients underwent postoperative adjuvant radiation therapy. One vertebral artery was ligated and sacrificed in each of three patients. Nerve root involved by tumor was sacrificed in three patients with preoperative upper extremity weakness. One patient (Case 3) had significant transient radiculopathy with paresis postoperatively. Another (Case 4) with C4 and C5 chordoma had respiratory difficulties and pneumonia after surgery postoperatively. He recovered completely after 2 weeks' management with a tracheotomy tube and antibiotics in the intensive care unit. No cerebrovascular complications and wound infection were observed. No local recurrence or instrumentation failure were detected during follow-up. Conclusion Though technically challenging, it is feasible and safe to perform en bloc resection of cervical primary bone tumors. This is the most effective means of managing cervical spine tumors. Preoperative 3- D printing modelling enables better anatomical understanding of the relationship between the tumor and cervical spine and can assist in planning the surgical procedure. [ABSTRACT FROM AUTHOR]

IRF-1, a kind of transcription factor, is expressed in many cell types, except in early embryonal cells. IRF-1 has played an essential role in various physiological and pathological processes, including tumor immune surveillance, viral infection, development of immunity system and pro-inflammatory injury. However, the expression and function of IRF-1 in spinal cord injury (SCI) are still unknown. In this study, we have performed an acute SCI model in adult rats and investigated the dynamic changes of IRF-1 expression in the spinal cord. Western blot have shown that IRF-1 protein levels gradually increased, reaching a peak at day 3 and then gradually declined to a normal level at day 14 after SCI. Double immunofluorescence staining showed that IRF-1 immunoreactivity was found in neurons, but not in astrocytes and microglia. Additionally, colocalization of IRF-1/active caspase-3 was detected in neurons. In vitro, IRF-1 depletion, by short interfering RNA, obviously decreases neuronal apoptosis. In conclusion, this is the first description of IRF-1 expression in spinal cord injury. Our results suggested that IRF-1 might play crucial roles in CNS pathophysiology after SCI. [ABSTRACT FROM AUTHOR]

Between June 2010 and June 2011, 176 patients were divided into 2 groups: a group with spinal metastasis of solid tumors (n=157) and a group with multiple myeloma (n=19). Both groups were further divided into 2 subgroups: a group receiving zoledronic acid before surgery and a control group. The zoledronic acid subgroup of the solid tumors group was group A (n=81), the control subgroup of the solid tumors group was group B (n=76), the zoledronic acid subgroup of the multiple myeloma group was group C (n=10), and the control subgroup of the multiple myeloma group was group D (n=9). The average intraoperative blood loss during spinal surgery was as follows: 1311±691 mL in group A and 1752±740 mL in group B (P=0.000) and 1994±810 mL in group C and 3134±795 mL in group D (P=0.000). Patients receiving zoledronic acid before surgery had significantly less intraoperative bleeding than those who did not receive it. Preoperative use of zoledronic acid can effectively reduce intraoperative bleeding during surgery for the treatment of spinal tumors. [ABSTRACT FROM AUTHOR]

Background In recent years, there have been more and more clinical trails focused on patient-reported outcomes (PRO), especially in the assessment of quality of life (QOL). Previous report on QOL assessment on patients with spinal metastases from primary hepatocellular carcinoma (HCC) is rare. And there is no standard treatment for those patients. Objective The purpose of the current study is to determine whether spinal surgery could improve QOL in HCC patients with spinal metastases and prolong their survival. Methods We conducted a single-center, non-randomized, prospective, longitudinal study in two groups: surgery group and non-surgery group. When diagnosed, all eligible patients completed a baseline QOL assessment using the Functional Assessment of Cancer Therapy-Hepatobiliary (FACT-Hep) questionnaire. All patients' quality of life was subsequently assessed again at another 4 time points: 1, 3, 6 and 9 months after diagnosis. Results From July 1, 2007 to March 31, 2009, we identified 62 patients (surgery group n = 29, non-surgery group n = 33) who were eligible for the observational study. Only 21 patients in the surgery group and 22 patients in the non-surgery group survived more than 9 months and completed all 5 follow-up QOL assessments. The median survival time was 12.6 months in the surgery group and 13.7 months in the non-surgery group ( P = 0.530). The results suggested that whether in the surgery or non-surgery group, QOL scores in 9-month period after diagnosis decreased in the same mode, and surgical treatment for spinal metastases could improve neither patients' QOL nor survival. Conclusion Spinal surgery could not provide benefits for patients with spinal metastases from HCC in QOL or survival. We do not recommend surgical treatment for patients with metastases from HCC to the spine. [ABSTRACT FROM AUTHOR]

The survival of patients with hepatocellular carcinoma (HCC) has been improved with various diagnostic tools and treatment modalities. Consequently, spinal metastases from HCC are diagnosed more frequently. We investigated the clinical biomarkers of HCC patients presenting with spinal metastasis. Between January 2001 and December 2007, we recruited 30 consecutive HCC patients presenting with spinal metastasis. Their tissue samples were collected and analyzed by immunohistochemistry in a tissue microarray. A total of 16 proteins were assessed in the tissue microarray; we found that expression of p16(INK4) correlated with the survival time (log-rank test, P = 0.05), and loss of p16(INK4) was significantly associated with osteopontin overexpression (Fisher exact test: P = 0.045, logistic regression: P = 0.024, OR = 0.184, 95% CI 0.035-0.963). Patients with osteopontin (-) and with p16(INK4) (+) lived longer than patients with osteopontin (+) and with p16(INK4) (-). We found that p16(INK4) and osteopontin might be the biomarkers of patients with spinal metastasis from HCC, a more large-scaled randomized study might be required to confirm the result and study the mechanism. [ABSTRACT FROM AUTHOR]

The survival of patients with hepatocellular carcinoma (HCC) has been improved with various diagnostic tools and treatment modalities. Consequently, spinal metastases from HCC are diagnosed more frequently. We investigated the clinical biomarkers of HCC patients presenting with spinal metastasis. Between January 2001 and December 2007, we recruited 30 consecutive HCC patients presenting with spinal metastasis. Their tissue samples were collected and analyzed by immunohistochemistry in a tissue microarray. A total of 16 proteins were assessed in the tissue microarray; we found that expression of p16 correlated with the survival time (log-rank test, P = 0.05), and loss of p16 was significantly associated with osteopontin overexpression (Fisher exact test: P = 0.045, logistic regression: P = 0.024, OR = 0.184, 95% CI 0.035–0.963). Patients with osteopontin (−) and with p16 (+) lived longer than patients with osteopontin (+) and with p16 (−). We found that p16 and osteopontin might be the biomarkers of patients with spinal metastasis from HCC, a more large-scaled randomized study might be required to confirm the result and study the mechanism. [ABSTRACT FROM AUTHOR]

BACKGROUND: The objective of this study was to determine whether surgery for patients with spinal metastasescould improve the quality of remaining life and prolong survival. METHODS: In total, 96 patients who had spinal metastases were recruited from Changzheng Hospital at the Second Military Medical University in Shanghai, China, overthe period from July 2007 to June 2009. The patients received treatments with or without spinal surgery (surgerygroup, n = 46 patients; nonsurgery group, n = 50 patients), and all patients received adjuvant therapies according totheir original cancer and individual conditions. Patients' quality of life (QOL) was assessed at 5 time points-at theinitial diagnosis (baseline) and at 1 month, 3 months, 6 months, and 9 months of followup-using theFunctional Assessment of Cancer Therapy-General QOL questionnaire. Information on survival also was collected.RESULTS: Sixty-seven of 96 patients completed all 5 follow-up assessments, including 33 patients in the surgerygroup and 34 patients in the nonsurgery group. The other 29 patients died within 9 months after the initial diagnosis.At the end of the study (June 2009), 22 patients (47.8%) remained alive in the surgery group, and with 16 patients(32%) remained alive in the nonsurgery group. The surgery group had significantly higher total QOL scores, physicalwell being scores, emotional well being scores, and functional well being scores than the nonsurgery group over the9-month assessment period. There was no statistically significant difference in survival between the 2 groups (P =.056). CONCLUSIONS: The current results indicated that surgical treatment greatly improved and maintained the QOL of patients who had spinal metastases over the 9-month assessment period and that surgery is an effectivetreatment for spinal metastases. [ABSTRACT FROM AUTHOR]

Abstract  A retrospective study evaluating complications in 2,233 consecutive patients of subaxial cervical disorders treated with an anterior cervical locking plate was performed, and recommendations for prevention and treatment were made. The average length of follow-up was 1.3 years. Any loosening or breaking of the plates and screws or malpositions that threatened tracheoesophageal or neurovascular structures were defined as the complications. There were 239 cases (10.7%) with different kinds of complications. The complications included oblique plating in 56 cases in which the screw could irritate the nerve root. Screws were driven into the disc space in four cases, which ultimately led to plate loosening. Screws penetrated the endplate or passed excessively close to it producing a triangle fracture in 19 cases. Loosening or breaking of the plate and the screw was found in 115 cases. These phenomena were always associated with non-union. Three oesophageal perforations occurred and conservative treatments proved effective. Finally, overlong plates impinged on the adjacent level in 14 cases and promoted disc degeneration ultimately leading to revision surgery. Good training and careful operation may help to decrease the complication rate. Most hardware complications are not symptomatic and can be treated conservatively. Only a few of them need immediate reoperation. [ABSTRACT FROM AUTHOR]

An amendment to this paper has been published and can be accessed via the original article. [ABSTRACT FROM AUTHOR]