scholarly journals Image guidance based on MRI for spinal interstitial laser thermotherapy: technical aspects and accuracy

2017 ◽  
Vol 26 (5) ◽  
pp. 605-612 ◽  
Author(s):  
Claudio E. Tatsui ◽  
Clarissa N. G. Nascimento ◽  
Dima Suki ◽  
Behrang Amini ◽  
Jing Li ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Epidural Space ◽  
Navigation System ◽  
Image Guidance ◽  
Soft Tissues ◽  
Spinal Metastasis ◽  
Region Of Interest ◽  
Cord Compression ◽  
Fiducial Markers ◽  
Laser Probes

OBJECTIVEImage guidance for spinal procedures is based on 3D-fluoroscopy or CT, which provide poor visualization of soft tissues, including the spinal cord. To overcome this limitation, the authors developed a method to register intraoperative MRI (iMRI) of the spine into a neuronavigation system, allowing excellent visualization of the spinal cord. This novel technique improved the accuracy in the deployment of laser interstitial thermal therapy probes for the treatment of metastatic spinal cord compression.METHODSPatients were positioned prone on the MRI table under general anesthesia. Fiducial markers were applied on the skin of the back, and a plastic cradle was used to support the MRI coil. T2-weighted MRI sequences of the region of interest were exported to a standard navigation system. A reference array was sutured to the skin, and surface matching of the fiducial markers was performed. A navigated Jamshidi needle was advanced until contact was made with the dorsal elements; its position was confirmed with intraoperative fluoroscopy prior to advancement into a target in the epidural space. A screenshot of its final position was saved, and then the Jamshidi needle was exchanged for an MRI-compatible access cannula. MRI of the exact axial plane of each access cannula was obtained and compared with the corresponding screenshot saved during positioning. The discrepancy in millimeters between the trajectories was measured to evaluate accuracy of the image guidanceRESULTSThirteen individuals underwent implantation of 47 laser probes. The median absolute value of the discrepancy between the location predicted by the navigation system and the actual position of the access cannulas was 0.7 mm (range 0–3.2 mm). No injury or adverse event occurred during the procedures.CONCLUSIONSThis study demonstrates the feasibility of image guidance based on MRI to perform laser interstitial thermotherapy of spinal metastasis. The authors' method permits excellent visualization of the spinal cord, improving safety and workflow during laser ablations in the epidural space. The results can be extrapolated to other indications, including biopsies or drainage of fluid collections near the spinal cord.

scholarly journals Utilization of laser interstitial thermotherapy guided by real-time thermal MRI as an alternative to separation surgery in the management of spinal metastasis

2015 ◽  
Vol 23 (4) ◽  
pp. 400-411 ◽  
Author(s):  
Claudio E. Tatsui ◽  
R. Jason Stafford ◽  
Jing Li ◽  
Jonathan N. Sellin ◽  
Behrang Amini ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Spinal Cord ◽  
Real Time ◽  
Spinal Cord Compression ◽  
Spinal Metastasis ◽  
Cord Compression ◽  
The Mean ◽  
Interstitial Thermotherapy

OBJECT High-grade malignant spinal cord compression is commonly managed with a combination of surgery aimed at removing the epidural tumor, followed by spinal stereotactic radiosurgery (SSRS) aimed at local tumor control. The authors here introduce the use of spinal laser interstitial thermotherapy (SLITT) as an alternative to surgery prior to SSRS. METHODS Patients with a high degree of epidural malignant compression due to radioresistant tumors were selected for study. Visual analog scale (VAS) scores for pain and quality of life were obtained before and within 30 and 60 days after treatment. A laser probe was percutaneously placed in the epidural space. Real-time thermal MRI was used to monitor tissue damage in the region of interest. All patients received postoperative SSRS. The maximum thickness of the epidural tumor was measured, and the degree of epidural spinal cord compression (ESCC) was scored in pre- and postprocedure MRI. RESULTS In the 11 patients eligible for study, the mean VAS score for pain decreased from 6.18 in the preoperative period to 4.27 within 30 days and 2.8 within 60 days after the procedure. A similar VAS interrogating the percentage of quality of life demonstrated improvement from 60% preoperatively to 70% within both 30 and 60 days after treatment. Imaging follow-up 2 months after the procedure demonstrated a significant reduction in the mean thickness of the epidural tumor from 8.82 mm (95% CI 7.38–10.25) before treatment to 6.36 mm (95% CI 4.65–8.07) after SLITT and SSRS (p = 0.0001). The median preoperative ESCC Grade 2 was scored as 4, which was significantly higher than the score of 2 for Grade 1b (p = 0.04) on imaging follow-up 2 months after the procedure. CONCLUTIONS The authors present the first report on an innovative minimally invasive alternative to surgery in the management of spinal metastasis. In their early experience, SLITT has provided local control with low morbidity and improvement in both pain and the quality of life of patients.

Relationship Between Paralysis and the Epidural Spinal Cord Compression Scale in Spinal Metastasis

Orthopedics ◽  
2020 ◽  
Vol 43 (6) ◽  
pp. e567-e573
Author(s):  
Hiroshi Uei ◽  
Yasuaki Tokuhashi ◽  
Masafumi Maseda
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Compression ◽  
Spinal Metastasis ◽  
Cord Compression

scholarly journals Non-fusion palliative spine surgery without reconstruction is safe and effective in spinal metastasis patients: retrospective study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Siravich Suvithayasiri ◽  
Borriwat Santipas ◽  
Sirichai Wilartratsami ◽  
Monchai Ruangchainikom ◽  
Panya Luksanapruksa
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Compression ◽  
Survival Data ◽  
Spinal Metastasis ◽  
Cord Compression ◽  
Neurological Deficits ◽  
Survival Duration ◽  
Related Complication ◽  
The Mean ◽  
Anterior Reconstruction

AbstractConsidering the shorter life expectancy and poorer prognosis of metastatic epidural spinal cord compression patients, anterior reconstruction and fusion may be unnecessary. This study aimed to investigate the outcomes of palliative surgery for metastatic epidural spinal cord compression with neurological deficit among patients who underwent posterior decompression and instrumentation without fusion or anterior reconstruction. This single-center retrospective review included all patients aged > 18 years with thoracic or lumbar spinal metastasis who were surgically treated for metastatic spinal cord compression without fusion or anterior reconstruction at the Department of Orthopaedic Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand during July 2015 to December 2017. Data from preoperation to the 1-year follow-up, including demographic and clinical data, Frankel classification, pain scores, complication, revision surgery, health-related quality-of-life scores, and survival data, were collected and analyzed. A total of 30 patients were included. The mean age was 59.83 ± 11.73 years, and 20 (66.7%) patients were female. The mean operative time was 208.17 ± 58.41 min. At least one Frankel grade improvement was reported in 53.33% of patients. The pain visual analog scale, the EuroQOL five-dimension five-level utility score, and the Oswestry Disability Index were all significantly improved at a minimum of 3 months after surgery. No intraoperative mortality or instrument-related complication was reported. The mean survival duration was 11.4 ± 8.97 months. Palliative non-fusion surgery without anterior reconstruction may be considered as a preferable choice for treating spinal metastasis patients with spinal cord compression with neurological deficits.

scholarly journals Spinal cord compression in cattle after the use of an oily vaccine

2011 ◽  
Vol 31 (11) ◽  
pp. 997-999 ◽  
Author(s):  
Daniel Guimarães Ubiali ◽  
Raquel Aparecida Sales da Cruz ◽  
Marconni Victor da Costa Lana ◽  
Yara Silva Meireles ◽  
Pedro Brandini Néspoli ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Epidural Space ◽  
Foot And Mouth Disease ◽  
Filling Defect ◽  
Cord Compression ◽  
Spinal Nerve ◽  
Nerve Roots ◽  
Longissimus Dorsi Muscle ◽  
Hind Limbs ◽  
Compressive Myelopathy

An outbreak of compressive myelopathy in cattle associated with the improper use of an oil vaccine is described. Neurological signs were observed in 25 out of 3,000 cattle after 60 days of being vaccinated against foot and mouth disease. The clinical picture was characterized by progressive paralysis of the hind limbs, difficulty in standing up, and sternal recumbency during the course of 2-5 months. A filling defect between the L1 and L3 vertebrae was seen through myelography performed in one of the affected animals. A yellow-gray, granular and irregular mass was observed in four necropsied animals involving the spinal nerve roots and epidural space of the lumbar (L1-L4) spinal cord; the mass was associated with a whitish oily fluid. This fluid was also found in association with necrosis of the longissimus dorsi muscle. Microscopic changes in the epidural space, nerve roots, and spinal musculature were similar and consisted of granulomas or pyogranulomas around circular unstained spaces (vacuoles). These spaces were located between areas of severe diffuse hyaline necrosis of muscle fibers and resembled the drops of oil present in the vaccine.

Phase I/II study of stereotactic body radiotherapy for spinal metastasis and its pattern of failure

2007 ◽  
Vol 7 (2) ◽  
pp. 151-160 ◽  
Author(s):  
Eric L. Chang ◽  
Almon S. Shiu ◽  
Ehud Mendel ◽  
Leni A. Mathews ◽  
Anita Mahajan ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Phase I ◽  
Epidural Space ◽  
Stereotactic Body Radiotherapy ◽  
Spinal Metastasis ◽  
Metastatic Cancer ◽  
Noncardiac Chest Pain ◽  
Pattern Of Failure ◽  
Grade 3

Object. The authors report data concerning the safety, effectiveness, and patterns of failure obtained in a Phase I/II study of stereotactic body radiotherapy (SBRT) for spinal metastatic tumors. Methods. Sixty-three cancer patients underwent near-simultaneous computed tomography–guided SBRT. Spinal magnetic resonance imaging was conducted at baseline and at each follow-up visit. The National Cancer Institute Common Toxicity Criteria 2.0 assessments were used to evaluate toxicity. Results. The median tumor volume of 74 spinal metastatic lesions was 37.4 cm3 (range 1.6–358 cm3). No neuropathy or myelopathy was observed during a median follow-up period of 21.3 months (range 0.9–49.6 months). The actuarial 1-year tumor progression–free incidence was 84% for all tumors. Pattern-of-failure analysis showed two primary mechanisms of failure: 1) recurrence in the bone adjacent to the site of previous treatment, and 2) recurrence in the epidural space adjacent to the spinal cord. Grade 3 or 4 toxicities were limited to acute Grade 3 nausea, vomiting, and diarrhea (one case); Grade 3 dysphagia and trismus (one case); and Grade 3 noncardiac chest pain (one case). There was no subacute or late Grade 3 or 4 toxicity. Conclusions. Analysis of the data obtained in the present study supports the safety and effectiveness of SBRT in cases of spinal metastatic cancer. The authors consider it prudent to routinely treat the pedicles and posterior elements using a wide bone margin posterior to the diseased vertebrae because of the possible direct extension into these structures. For patients without a history of radiotherapy, more liberal spinal cord dose constraints than those used in this study could be applied to help reduce failures in the epidural space.

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