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Neurology International Apr 2024Sacral Tarlov cysts (TCs), often asymptomatic, can cause significant pain and severe neurological dysfunction. Conventional treatments are generally associated with high...
Sacral Tarlov cysts (TCs), often asymptomatic, can cause significant pain and severe neurological dysfunction. Conventional treatments are generally associated with high recurrence and complication rates. Specifically, the substantial recurrence rates, which can reach as high as 50%, significantly impact long-term outcomes. Recent evidence increasingly supports the hypothesis that the formation of Tarlov cysts (TCs) may be associated with inflammatory processes within the nerve root sheath, further exacerbated by elevated cerebrospinal fluid (CSF) pressure. This retrospective study explores thecaloscopy, combined with surgical techniques, as a more effective alternative. We observed a total of 78 patients, 48 of whom underwent endoscopic fenestration of the arachnoid sheath in addition to microsurgical resection of the TC. We found that the fenestration of the arachnoid sheath at the level of lumbosacral spinal nerve root entry led to a significantly decreased risk of developing recurrent TCs (5/48 vs. 9/30). Only one of the patients suffered from a persistent new bladder dysfunction after microsurgical resection. This presented technique provides a promising treatment path for the future management of TCs, offering a safe and more effective treatment option compared to previous methods. Additionally, the advantages of the thecaloscopy provide pathophysiological implications regarding the development of perineural cysts.
PubMed: 38668130
DOI: 10.3390/neurolint16020033 -
Sichuan Da Xue Xue Bao. Yi Xue Ban =... Mar 2024To study the microanatomic structure of the subtemporal transtentorial approach to the lateral side of the brainstem, and to provide anatomical information that will...
OBJECTIVE
To study the microanatomic structure of the subtemporal transtentorial approach to the lateral side of the brainstem, and to provide anatomical information that will assist clinicians to perform surgeries on the lateral, circumferential, and petroclival regions of the brainstem.
METHODS
Anatomical investigations were conducted on 8 cadaveric head specimens (16 sides) using the infratemporal transtentorial approach. The heads were tilted to one side, with the zygomatic arch at its highest point. Then, a horseshoe incision was made above the auricle. The incision extended from the midpoint of the zygomatic arch to one third of the mesolateral length of the transverse sinus, with the flap turned towards the temporal part. After removing the bone, the arachnoid and the soft meninges were carefully stripped under the microscope. The exposure range of the surgical approach was observed and the positional relationships of relevant nerves and blood vessels in the approach were clarified. Important structures were photographed and the relevant parameters were measured.
RESULTS
The upper edge of the zygomatic arch root could be used to accurately locate the base of the middle cranial fossa. The average distances of the star point to the apex of mastoid, the star point to the superior ridge of external auditory canal, the anterior angle of parietomastoid suture to the superior ridge of external auditory canal, and the anterior angle of parietomastoid suture to the star point of the 10 adult skull specimens were 47.23 mm, 45.27 mm, 26.16 mm, and 23.08 mm, respectively. The subtemporal approach could fully expose the area from as high as the posterior clinoid process to as low as the petrous ridge and the arcuate protuberance after cutting through the cerebellar tentorium. The approach makes it possible to handle lesions on the ventral or lateral sides of the middle clivus, the cistern ambiens, the midbrain, midbrain, and pons. In addition, the approach can significantly expand the exposure area of the upper part of the tentorium cerebelli through cheekbone excision and expand the exposure range of the lower part of the tentorium cerebelli through rock bone grinding technology. The total length of the trochlear nerve, distance of the trochlear nerve to the tentorial edge of cerebellum, length of its shape in the tentorial mezzanine, and its lower part of entering into the tentorium cerebelli to the petrosal ridge were (16.95±4.74) mm, (1.27±0.73) mm, (5.72±1.37) mm, and (4.51±0.39) mm, respectively. The cerebellar tentorium could be safely opened through the posterior clinoid process or arcuate protrusion for localization. The oculomotor nerve could serve as an anatomical landmark to locate the posterior cerebral artery and superior cerebellar artery.
CONCLUSION
Through microanatomic investigation, the exposure range and intraoperative difficulties of the infratemporal transtentorial approach can be clarified, which facilitates clinicians to accurately and safely plan surgical methods and reduce surgical complications.
Topics: Humans; Cadaver; Brain Stem; Temporal Bone; Cranial Fossa, Middle; Craniotomy
PubMed: 38645855
DOI: 10.12182/20240360506 -
Journal of Neurosurgery. Case Lessons Apr 2024Primary hemifacial spasm (HFS) is usually caused by arterial compression of the facial nerve at the root exit zone at the brainstem. Rarely, a purely venous compression...
BACKGROUND
Primary hemifacial spasm (HFS) is usually caused by arterial compression of the facial nerve at the root exit zone at the brainstem. Rarely, a purely venous compression is seen. However, arachnoid bands strangulating the facial nerve have not been recognized as a cause of hemifacial spasm.
OBSERVATIONS
The authors present a case of a 24-year-old female who had experienced HFS for 9 years. Endoscopic inspection of the root exit zone revealed no vascular compression but an arachnoid band strangulating the facial nerve. After cutting the band, the lateral spread response disappeared, and the patient was immediately spasm free after the surgery. Two years later, she was still doing well without any spasms.
LESSONS
This is the third patient in the authors' series of 535 patients who had no vascular conflict but rather a strangulation of the nerve by arachnoid bands. All patients have remained spasm free. To the authors' knowledge, no other group has reported arachnoid bands as an etiological factor of HFS so far.
PubMed: 38621308
DOI: 10.3171/CASE24164 -
Child's Nervous System : ChNS :... Jul 2024Prenatally diagnosed complex arachnoid cysts are very rare. While the true prenatal incidence is still unknown, they account for approximately 1% of intracranial masses... (Review)
Review
OBJECTIVES
Prenatally diagnosed complex arachnoid cysts are very rare. While the true prenatal incidence is still unknown, they account for approximately 1% of intracranial masses in newborns. They rarely exhibit rapid growth or cause obstructive hydrocephalus, but if they increase to such a dimension during pregnancy, the ideal management is not well established. We present our detailed perinatal experience, covering prenatal diagnosis, a compassionate delivery process, and neonatal stabilization. Finally, a thorough postnatal neurosurgical intervention was performed. Initially, our focus was on the gradual reduction of cyst size as a primary effort, followed by subsequent definitive surgical treatment.
METHODS
This case series shows the treatment course of three fetuses with antenatally diagnosed large arachnoid cysts. We present pre- and postnatal management and imaging, as well as the surgical treatment plan and the available clinical course during follow-up.
RESULTS
Two girls and one boy were included in the current review. All three cases presented with prenatally diagnosed complex arachnoid cysts that increased in size during pregnancy. The mean gestational age at delivery was 35 weeks (range 32 to 37 weeks), and all patients were delivered by a caesarian section. Increasing head circumference and compression of brain structures were indications for delivery, as they are associated with a high risk of excess intracranial pressures and CSF diapedesis, as well as traumatic delivery and maternal complications. All cysts were supratentorial in location; one expanded into the posterior fossa, and one was a multicompartment cyst. All children underwent an initial surgical procedure within the first days of life. To relieve cyst pressure and achieve a reduction in head circumference, an ultrasound-guided or endoscopic-assisted internal shunt with drainage of the cyst to the ventricles or subdural/subarachnoid space was inserted. Definite surgical therapy consisted of cyst marsupialization and/or cysto-peritoneal shunt implantation. All children survived without severe neurodevelopmental impairments.
CONCLUSION
With the cases presented, we demonstrate that the slow reduction of immense cyst size as an initial procedure until optimal requirements for final surgical treatment were achieved has proven to be optimal for neurological outcome. Special emphasis has to be taken on the delicate nature of premature newborn babies, and surgical steps have to be thoroughly considered within the interdisciplinary team.
Topics: Female; Humans; Infant, Newborn; Pregnancy; Arachnoid Cysts; Neurosurgical Procedures; Prenatal Diagnosis
PubMed: 38602531
DOI: 10.1007/s00381-024-06385-w -
Journal of Community Hospital Internal... 2023Multiple cranial nerve palsies frequently accompany hypoglossal nerve palsy, potentially indicating malignancy, such as lymphoma, nasopharyngeal carcinoma, or...
Multiple cranial nerve palsies frequently accompany hypoglossal nerve palsy, potentially indicating malignancy, such as lymphoma, nasopharyngeal carcinoma, or metastases. However, when solely the hypoglossal nerve is affected, the causes may involve Chiari malformation, arachnoid cyst, or infectious mononucleosis, suggesting a positive prognosis. Craniocervical junction tuberculosis (TB), is an uncommon cause of isolated hypoglossal nerve palsy and has been reported infrequently in the literature. Craniocervical junction tuberculosis accounts for only 0.5% of TB cases overall and 6% of extra-pulmonary TB cases. We present here one such case of a 17-year-old male of Indian origin with a subacute history of tongue deviation and neck pain. Additionally, the patient reported loss of weight and appetite. The patient had significant posterior cervical lymphadenopathy. Neurological examination revealed findings suggestive of right peripheral hypoglossal nerve involvement. Blood investigations showed lymphocytosis along with an elevated erythrocyte sedimentation rate of 45 mm/h and elevated lactate dehydrogenase levels of 325 U/L. Tuberculin skin testing was positive and sputum acid-fast staining confirmed acid-fast bacilli. Magnetic Resonance Imaging of the cervical spine revealed a soft tissue component in the prevertebral space measuring 3.5×4.8 cm with a right paraspinal component adjoining the hypoglossal canal with peripheral contrast enhancement. Histological findings on the lymph node showed granulomatous lymphadenitis, suggestive of tuberculosis. The patient was started on 4-drug anti-tubercular therapy consisting of Isoniazid, Rifampicin, Pyrazinamide, and Ethambutol for a period of 18 months. He was subsequently followed up for 6 months till the resolution of palsy. This case emphasizes the importance of thorough evaluation and a meticulous workup to identify the underlying cause of hypoglossal nerve palsy and the importance of considering tuberculosis as a potential cause of isolated hypoglossal nerve palsy in everyday practice.
PubMed: 38596544
DOI: 10.55729/2000-9666.1267 -
Indian Journal of Anaesthesia Apr 2024Peri-capsular nerve group (PENG) block is a novel ultrasound (US)-guided technique to achieve regional analgesia in hip fractures. We compared the effectiveness of two...
Evaluation of two doses (20 mL and 15 mL) of 0.25% bupivacaine in pericapsular nerve group block for patient positioning for sub-arachnoid block during hip fracture surgery: A single-centre, randomised comparative trial.
BACKGROUND AND AIMS
Peri-capsular nerve group (PENG) block is a novel ultrasound (US)-guided technique to achieve regional analgesia in hip fractures. We compared the effectiveness of two doses of 0.25% bupivacaine (20 mL and 15 mL) in the US-guided PENG block for positioning patients for sub-arachnoid block (SAB) during hip fracture surgery.
METHODS
The randomised trial included 60 patients aged 40-90 years undergoing hip fracture surgery under SAB. PENG block was given by a US-guided approach with the patient in a supine position 20 minutes before SAB, and a total of 20 mL and 15 mL of bupivacaine (0.25%) were given in groups A and B, respectively. The primary outcome was to measure and compare the ease of positioning (EOP) of patients for the conduct of SAB. The secondary outcome was the pain assessment at rest and 15° leg raise position at baseline and 10 and 20 minutes post block using the verbal analogue scale (VAS). Continuous variables were compared using the -test, and categorical variables were analysed using Pearson's Chi-square test or Fisher's exact test.
RESULTS
The mean (standard deviation) grade of EOP for SAB was significantly better in group A (2.47 (0.73) (95% confidence interval [CI]: 2.19-2.69)) than in group B (1.86 (0.62) (95% CI: 1.65-2.1)) ( = 0.001). The decrease in VAS scores was significantly higher in group A compared to group B at resting and 15° leg raise position at all-time points ( < 0.05).
CONCLUSION
A dose of 20 mL of 0.25% bupivacaine shows better outcomes than 15 mL regarding the patient's positioning during the SAB.
PubMed: 38586258
DOI: 10.4103/ija.ija_258_23 -
Non-coding RNA Research Sep 2024Meningiomas, characterized primarily as benign intracranial or spinal tumors, present distinctive challenges due to their variable clinical behavior, with certain cases... (Review)
Review
Meningiomas, characterized primarily as benign intracranial or spinal tumors, present distinctive challenges due to their variable clinical behavior, with certain cases exhibiting aggressive features linked to elevated morbidity and mortality. Despite their prevalence, the underlying molecular mechanisms governing the initiation and progression of meningiomas remain insufficiently understood. MicroRNAs (miRNAs), small endogenous non-coding RNAs orchestrating post-transcriptional gene expression, have garnered substantial attention in this context. They emerge as pivotal biomarkers and potential therapeutic targets, offering innovative avenues for managing meningiomas. Recent research delves into the intricate mechanisms by which miRNAs contribute to meningioma pathogenesis, unraveling the molecular complexities of this enigmatic tumor. Meningiomas, originating from arachnoid meningothelial cells and known for their gradual growth, constitute a significant portion of intracranial tumors. The clinical challenge lies in comprehending their progression, particularly factors associated with brain invasion and heightened recurrence rates, which remain elusive. This comprehensive review underscores the pivotal role of miRNAs, accentuating their potential to advance our comprehension of meningioma biology. Furthermore, it suggests promising directions for developing diagnostic biomarkers and therapeutic interventions, holding the promise of markedly improved patient outcomes in the face of this intricate and variable disease.
PubMed: 38577017
DOI: 10.1016/j.ncrna.2024.02.011 -
Annals of Medicine and Surgery (2012) Apr 2024PHACE syndrome is a rare neurocutaneous disorder characterized by large segmental hemangiomas on the face and is associated with multiple developmental defects. PHACE...
INTRODUCTION AND IMPORTANCE
PHACE syndrome is a rare neurocutaneous disorder characterized by large segmental hemangiomas on the face and is associated with multiple developmental defects. PHACE stands for posterior fossa malformations, hemangiomas, arterial abnormalities, cardiac defects, and eye anomalies, with the most common manifestation being hemangioma in the cervico-facial region in early childhood.
CASE PRESENTATION
The authors report a case of a 15-year-female with complaints of facial hemangioma which on multisystemic imaging showed features of central nervous system (CNS) anomalies that led to the diagnosis of PHACE syndrome. The patient was started on propanolol which decreased the size of hemangioma in follow-up visits.
CLINICAL DISCUSSION
The hemangioma in the frontotemporal and frontonasal area of the face are associated more with CNS and cardiovascular anomalies needing a detailed multisystem approach. CNS anomalies include posterior cerebral fossa enlargement, cystic dilation of the fourth ventricle, arachnoid cyst, and cerebellar hypoplasia which were present in our case. Propanolol is considered the first-line drug for facial hemangioma with reported evidence of remarkable improvement and good tolerance. However, regular follow-up of the patient is needed to rule out any recurrence.
CONCLUSION
PHACE syndrome, although being a rare occurrence, must be kept as a differential diagnosis in infants and children with facial hemangioma. Imaging modalities like MRI/magnetic resonance arteriography must be used to rule out possible associations related to PHACE syndrome and focus on early treatment to prevent possible complications.
PubMed: 38576986
DOI: 10.1097/MS9.0000000000001759 -
International Medical Case Reports... 2024Arachnoiditis is difficult to treat. Patients are often left frustrated after many failed trials of conservative therapies without symptom resolution. Surgery may...
Arachnoiditis is difficult to treat. Patients are often left frustrated after many failed trials of conservative therapies without symptom resolution. Surgery may provide symptom relief for a short period of time, but their pain often returned. Herein, we present three cases of acute arachnoiditis following three different pain procedures: epidural blood patch, IDDS implant, and epidural steroid injection. The patients were diagnosed and treated with corticosteroids within 10 days of the procedure. Two patients were treated with the same oral steroid regiment, while the third patient was treated with both oral and IV steroid. All three patients had good outcomes at the completion of their steroid therapy. This case series may provide insight into treating acute and subacute arachnoiditis from pain interventions.
PubMed: 38559495
DOI: 10.2147/IMCRJ.S445705 -
Cureus Feb 2024We report the case of a 33-year-old male patient with no past medical history presenting to our tertiary referral center with progressive (two years) deficit of lower...
We report the case of a 33-year-old male patient with no past medical history presenting to our tertiary referral center with progressive (two years) deficit of lower limb motor impairment (2/5 Medical Research Council [MRC] scale) and sensory impairment. T2- and T1-weighted MRI images clarified the nature of the cyst from T3 to T8. In our case, surgical management was warranted to relieve tension over the spinal cord, thus improving symptoms. Two multilevel laminectomies were performed, one centered on the proximal pole and the other on the distal pole; subsequently, the epidural cyst was gradually folded until it was totally extracted without complications. In the present study, we discuss a technique of extended spinal compressive arachnoid cyst. To the best of our knowledge, this technique has not been previously described in the existing body of literature. Here, we present a case of a successful procedure that seems both efficient and safe. Further study will be required to confirm its safety and efficacy.
PubMed: 38550475
DOI: 10.7759/cureus.54978