Retroperitoneal approach for the treatment of diaphragmatic crus syndrome: technical note

OBJECTIVEMyelopathy selectively involving the lower extremities can occur secondary to spondylotic changes, tumor, vascular malformations, or thoracolumbar cord ischemia. Vascular causes of myelopathy are rarely described. An uncommon etiology within this category is diaphragmatic crus syndrome, in which compression of an intersegmental artery supplying the cord leads to myelopathy. The authors present the operative technique for treating this syndrome, describing their experience with 3 patients treated for acute-onset lower-extremity myelopathy secondary to hypoperfusion of the anterior spinal artery.METHODSAll patients had compression of a lumbar intersegmental artery supplying the cord; the compression was caused by the diaphragmatic crus. Compression of the intersegmental artery was probably producing the patients’ symptoms by decreasing blood flow through the artery of Adamkiewicz, causing lumbosacral ischemia.RESULTSAll patients underwent surgery to transect the offending diaphragmatic crus. Each patient experienced substantial symptom improvement, and 2 patients made a full neurological recovery before discharge.CONCLUSIONSDiaphragmatic crus syndrome is a rare or under-recognized cause of ischemic myelopathy. Patients present with episodic acute-on-chronic lower-extremity paraparesis, gait instability, and numbness. Angiography confirms compression of an intersegmental artery that gives rise to a dominant radiculomedullary artery. Transecting the offending diaphragmatic crus can produce complete resolution of neurological symptoms.

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Clinical and angioarchitectural characteristics of spinal vascular malformations of the cervical spine

Journal of Neurosurgery Spine ◽

10.3171/2019.11.spine19798 ◽

2020 ◽

Vol 32 (5) ◽

pp. 755-762 ◽

Cited By ~ 1

Author(s):

Waleed Brinjikji ◽

Elisa Colombo ◽

Giuseppe Lanzino

Keyword(s):

Cervical Spine ◽

Lower Extremity ◽

Clinical Presentation ◽

Vascular Malformations ◽

Case Series ◽

Acute Onset ◽

Lower Extremity Weakness ◽

Arteriovenous Fistulas ◽

Spinal Vascular Malformations ◽

Interventional Neuroradiologist

OBJECTIVEVascular malformations of the cervical spine are exceedingly rare. To date there have been no large case series describing the clinical presentation and angioarchitectural characteristics of cervical spine vascular malformations. The authors report their institutional case series on cervical spine vascular malformations diagnosed and treated at their institution.METHODSThe authors retrospectively reviewed all patients with spinal vascular malformations from their institution from January 2001 to December 2018. Patients with vascular malformations of the cervical spine were included. Lesions were characterized by their angioarchitectural characteristics by an interventional neuroradiologist and endovascular neurosurgeon. Data were collected on clinical presentation, imaging findings, treatment outcomes, and long-term follow-up. Descriptive statistics are reported.RESULTSOf a total of 213 patients with spinal vascular malformations, 27 (12.7%) had vascular malformations in the cervical spine. The mean patient age was 46.1 ± 21.9 years and 16 (59.3%) were male. The most common presentations were lower-extremity weakness (13 patients, 48.1%), tetraparesis (8 patients, 29.6%), and lower-extremity sensory dysfunction (7 patients, 25.9%). Nine patients (33.3%) presented with hemorrhage. Fifteen patients (55.6%) had modified Rankin Scale scores of 0–2 at the time of diagnosis. Regarding angioarchitectural characteristics, 8 patients (29.6%) had intramedullary arteriovenous malformations (AVMs), 5 (18.5%) had epidural arteriovenous fistulas (AVFs), 4 (14.8%) had paraspinal fistulas, 4 (14.8%) had mixed epidural/intradural fistulas, 3 (11.1%) had perimedullary AVMs, 2 (7.4%) had dural fistulas, and 1 patient (3.7%) had a perimedullary AVF.CONCLUSIONSThis retrospective study of 27 patients with cervical spine vascular malformations is the largest series to date on these lesions. The authors found substantial angioarchitectural heterogeneity with the most common types being intramedullary AVMs followed by epidural AVFs, paraspinal fistulas, and mixed intradural/extradural fistulas. Angioarchitecture dictated the clinical presentation as intradural shunts were more likely to present with hemorrhage and acute onset myelopathy, while dural and extradural shunts presented as either incidental lesions or gradually progressive congestive myelopathy.

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Etiology and Treatment Outcomes for Sural Neuroma

Foot & Ankle International ◽

10.1177/1071100719828375 ◽

2019 ◽

Vol 40 (5) ◽

pp. 545-552 ◽

Cited By ~ 3

Author(s):

Jonathan Lans ◽

Linda Gamo ◽

Christopher W. DiGiovanni ◽

Neal C. Chen ◽

Kyle R. Eberlin

Keyword(s):

Postoperative Pain ◽

Lower Extremity ◽

Complete Resolution ◽

Symptomatic Relief ◽

Case Series ◽

Symptom Improvement ◽

Level Of Evidence ◽

Initial Surgery ◽

Pain Symptoms ◽

Pain Improvement

Background: Neuroma results from disorganized regeneration following nerve injury and may be symptomatic. The aim of this study was to investigate the causes, treatment, and outcomes of operatively treated sural neuromas, and to describe the factors associated with persistent or unchanged postoperative pain symptoms. Methods: Consecutive patients with surgically treated sural neuromas in a 14-year period were identified using Current Procedural Terminology (CPT) codes ( n = 49), followed by a chart review to collect patient and treatment characteristics. Postoperative pain symptoms were categorized as complete resolution of pain, improvement of pain, no change in pain, or worse pain. The median patient age was 46.5 years (interquartile range [IQR], 39.1-51.3), and median follow-up was 4.0 years (IQR, 1.9-9.2). Results: Ninety percent of symptomatic sural neuromas developed as a result of previous lower extremity surgery. Initial surgery of sural neuroma led to improvement in pain in 63% of patients, and an additional 8.2% of the patients had improvement after secondary neuroma surgery. Pain relief after diagnostic injection showed a trend toward an association with postoperative pain improvement. Neuroma excision and implantation in muscle was the most common surgical technique used (67%). Four of the 7 patients that underwent a second neuroma operation reported symptom improvement. Conclusion: Sural neuromas may arise from prior surgery or trauma to the lower extremity. Surgical intervention resulted in either improvement or complete resolution of pain symptoms in 71% of patients, although occasionally more than one procedure was required to obtain symptomatic relief. Preoperative anesthetic injection may help identify patients that benefit from neuroma surgery. Level of Evidence: Level IV, retrospective case series.

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Sciatic-to-Femoral Nerve End-to-End Coaptation for Proximal Lower Extremity Function in Patients With Acute Flaccid Myelitis: Technical Note and Review of the Literature

Operative Neurosurgery ◽

10.1093/ons/opab057 ◽

2021 ◽

Author(s):

Daniel Lubelski ◽

Zach Pennington ◽

Sami Tuffaha ◽

Amy Moore ◽

Allan J Belzberg

Keyword(s):

Sciatic Nerve ◽

Lower Extremity ◽

Femoral Nerve ◽

Nerve Transfer ◽

Knee Extension ◽

Acute Onset ◽

Technical Note ◽

Lower Extremity Function ◽

Acute Flaccid Myelitis ◽

End To End

Abstract BACKGROUND Acute flaccid myelitis (AFM) is an acute-onset anterior horn disease resulting in flaccid paralysis of extremities, trunk, facial, and cervical musculature in children following upper respiratory or gastrointestinal viral illness. Nerve transfer procedures have been shown to restore function. OBJECTIVE To present a technical description of sciatic-to-femoral nerve transfers in 4 children with AFM. METHODS Retrospective review of relevant cases was performed. RESULTS A total of 4 cases are presented of young children with persistent quadriparesis in the setting of AFM, presenting between 4 and 15 mo following initial diagnosis. Electromyography showed denervation of muscles innervated by the femoral nerve, with sparing of the sciatic distribution. The obturator nerve was also denervated in all patients. We therefore elected to pursue sciatic-to-femoral transfers to restore active knee extension. These transfers involved end-to-end coaptation of a sciatic nerve fascicle to the femoral nerve motor branches supplying quadriceps muscles. CONCLUSION We present technical descriptions of bilateral sciatic-to-femoral nerve neurotization for the restoration of quadriceps function in 4 patients with AFM. The sciatic nerve fascicles are a reasonable alternative donor nerve for patients with proximal muscle paralysis and limited donor options in the lower extremity.

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