The authors present a case of a 55-year-old male with T10 complete paraplegia diagnosed with Charcot arthropathy of the spine (CAS).
He presented to an outside institution with vomiting and productive cough with subsequent computed tomography (CT) and MRI imaging revealing L5 osteomyelitis and a paraspinal abscess. Given the patient’s inability to remain in good posture in his wheelchair he underwent a multilevel vertebrectomy and thoracolumbar fusion. Due to multiple co-morbidities, surgical recovery was complex, ultimately requiring revision circumferential fixation.
CAS is an uncommon, long-term complication of traumatic spinal cord injury (SCI). Surgical management is often complex and associated with significant complications. Currently, a consensus on CAS prevention, specific surgical fixation techniques and post-surgical nursing care management is lacking. In this case report we provide our experience in the management of a complex case of CAS to aid in decision making for future neurosurgeons who encounter this sequela of traumatic SCI.
Any insult to the vertebral column and spinal cord can lead to alterations of its function and vertebral column destruction. Pathologies such as Parkinson’s Disease, diabetic neuropathy, syringomyelia, and neural tube defects have been shown to cause neuroarthropathy as a long-term sequela [1, 2]. Jean-Marie Charcot first described Charcot arthropathy in a patient in the 1800’s. The first report of CAS was published in 1884 in a patient with tabes dorsalis, but with the advent of antibiotic treatments, CAS as a sequela of syphilis is rare [3, 4]. CAS is now a well-defined long-term complication following traumatic spinal cord injury (SCI), developing on average 17 years after injury.
The pathophysiology is not well understood, but believed to be a combination of neuro-trauma due to loss of sensation at the joint and neurovascular abnormalities due to inflammation . Recurrent infections increase joint destruction, and therefore more prevalent in wheelchair-bound patients with poor nursing care . Currently, no consensus exists on neurosurgical management of CAS. Here we describe the case of a patient with paraplegia who developed CAS following a traumatic SCI complicated by a complex hospital course.
History and examination
A 55-year-old male with T10 complete paraplegia was transferred to our institution on broad-spectrum antibiotics from another facility after presenting with 2 days of emesis and productive cough. He was being treated for a “bone infection” and lateral abdominal wall abscess with drain placement, which was mal-positioned on radiologic imaging. Eleven years ago, the patient was injured from a gunshot wound leaving him with paraplegia. He had neurogenic bowel and bladder dysfunction managed with an indwelling urethral catheter and sigmoid colostomy. Additionally, the patient had poor skilled nursing care, resulting in non-healing sacral and lower extremity ulcers.
Physical exam on transfer was remarkable for inability to sit upright in his wheelchair, minimal expiratory wheezing, increased green/brown watery ostomy output, multiple ulcers, sacral wound with significant depth beyond the spinal column, tenderness to palpation on the thoracic spine, and exposed wound on the lumbar spine with an overlying hard palpable mass. Neurologic exam was notable for flaccid paralysis in the bilateral lower extremities and a T10 sensory level at the umbilicus. Medical history was notable for COPD, left lower extremity osteomyelitis, Clostridium difficle colitis, MRSA and IV drug use. Lab values were notable for elevated inflammatory markers (ESR/CRP), leukocytosis, and hypoalbuminemia.
Outside CT abdominal/pelvis with contrast demonstrated a large sacral pressure ulcer with underlying fragmentation and destruction of the bilateral lumbosacral junctions; osteomyelitis of the left ischium and right iliac bone; and 6-cm left lateral wall abscess with osteomyelitis at the left eleventh rib and dislodged drainage catheter outside of the fluid collection (Fig. 1).
Subsequent non-contrast CT demonstrated severe T11 vertebral body deformity, a ballistic tract extending into the spinal canal and articular process of T12 and retained ballistic fragment in the left T12 paraspinal soft tissue. A sacral pressure ulcer extended into the lumbosacral junction causing osteomyelitis of the right iliac crest, L2/L3 vertebral bodies, and sacrum (Fig. 1). Imaging was also notable for complete destruction of the L4 and L5 vertebral bodies, periosteal destruction, and sclerosis of the L3 vertebral body extending into the L2-3 disc space (Fig. 1).
Index surgical treatment
On hospital day (HOD) 10, the patient underwent an index surgery of L4 and L5 vertebral column resection, posterior L3-S1 interbody fusion utilizing cage and bone graft, T2-iliac posterior spinal fusion with instrumentation and bone graft, and L1–L2 and L2–L3 osteotomy. As patient was wheelchair bound, fusion to T2 was done to optimize upright positioning. A wound VAC was placed inferiorly over the sacral region and iliac crest bilaterally up to L3. The top three-quarter portion of the wound was closed in the usual fashion. Per patients request, the retained bullet in the paraspinal musculature was removed. Upper extremity somatosensory and motor evoked potentials performed throughout the case showed no changes from baseline. All thoracic screws showed greater than 8 mAs and intraoperative O-arm demonstrated appropriate positioning of implants and screws (Fig. 2).
Post-operatively, the patient remained intubated due to respiratory insufficiency secondary to prolonged anesthesia time and persistent hypotension requiring pressure support and transfusion. Intraoperative estimated blood loss was 700cc and the patient received 2.7L crystalloid, 6 units of packed red blood cells (PRBCs), and 2 units of fresh frozen plasma (FFP). The patient was extubated on post-operative day (POD) 1 but remained persistently hypotensive and tachycardic. Patient had a complicated and difficult post-operative course. Due to nephrotoxicity from vancomycin while hypotensive, the patient developed a non-oliguric acute kidney injury and hydronephrosis from a mal-positioned indwelling catheter. During a routine wound VAC change on POD 20, the patient felt a “pop” and noticed his distal fixation present. Imaging revealed pullout of the iliac screw fixation and loss of distraction with the interbody cage (Fig. 3).
On HOD 30/POD21, the patient returned to the operating room for a revision T2-iliac posterior spinal fusion with instrumentation, L3-S1 anterior interbody fixation, implantation of new bilateral iliac screw, iliac crest cortoss fixation, and transiliac bar cross link fixation (Fig. 3). A wound VAC was placed over the entire surgical field.
Patient remained in the hospital for IV broad-spectrum antibiotics in consultation with infectious disease service and bi-weekly wound VAC changes. Despite his co-morbidities, the surgical site healed well. However, was deemed a non-optimal candidate for debridement and skin flap closure of his sacral pressure ulcer. The patient was discharged home 5 months from initial presentation with home health care and indefinite IV and oral antibiotics.
Patients who develop CAS often present with back pain, wheelchair instability, or autonomic dysreflexia inferior to the level of injury [7, 8]. Signs of CAS development often do not manifest for decades after injury and may be overlooked .
Aebli et al. has investigated the clinical presentation and early detection of CAS in high risk patients and recommends radiological screening in patients with paraplegia to identify disc space narrowing [9, 10]. Surgical fusion and instrumentation has been reported to provide positive outcomes and allow patients to return to their previous level of activity; however, the risk of re-occurrence in patients with paraplegia warrants careful consideration prior to intervention [11,12,13] .
Surgical treatment is known to have a high rate of complications and there are no established recommendations for optimal surgical approach . Recent case series recommend circumferential fixation for patients with multiple level involvement, whether performed as a single-stage or multi-stage operation [5, 15]. Use of bone morphogenetic protein and four-rod lumbopelvic fixation showed favorable outcomes in 23 patients . Zyck et al. reports relief of autonomic dysreflexia symptoms after four-rod thoracolumbar posterior fusion in a patient with C6 quadriplegia .
A case series of nine patients demonstrated successful fusion in all patients, eight of which underwent circumferential fusion, with an improvement in functional status in all patients . However, successful posterior fusions have been observed in patients with only mild bone destruction . Although one-staged anterior and posterior fusion has shown the most favorable outcomes, two-staged fusion in posterior instrumentation followed by anterior bone graft can be used in patients with extensive co-morbidities who cannot tolerate prolonged operative times . Few studies have reported long-term follow-up.
Haus et al., demonstrated an average follow-up of 14.3 years and noted that 75% of patients who received a fusion developed another Charcot joint requiring revision surgery . Thus, the authors recommended conservative treatment in those whose dysreflexia symptoms can be managed non-surgically . In contrast, Grassner et al., advises against posterior-only fusions due to a high rate of pseudoarthrosis, as seen in our patient, and wound healing delays . Unique to our patient, Suda et al., recommends percutaneous external spinal fixation and wound irrigation for unstable spine lesions with infection, followed by definitive surgical management when infection resolves .
Prevention is centered around decreasing the force applied to bony elements of the spine. Standaert et al., cautions against long fusions that end at the thoracolumbar junction, or procedures that increase upper trunk mobility as these increase stress on the lower spine . Post-operatively, positioning and turning patients should be centered around decreasing the stress on the spine and the patient should be turned every 2–3 h. Initially, turning is restricted to 30 degrees on each side with the two-person logrolling technique, one supporting the shoulders and buttocks, while the other supports the knees and waist; this reduces twisting of the spine .
CAS is a long-term complication in patients with traumatic SCI. Surgical management is complex with a high level of complications. A multi-modal treatment approach is necessary as patients often have multiple co-morbidities limiting wound healing and successful arthrodesis. Prevention of CAS by appropriate nursing care and early mobilization is crucial. Surgeons report favorable outcomes following one-staged circumferential fusion in good surgical candidates. Our patient did not undergo initial circumferential fusion. In hindsight, he may have benefited from this approach due to extensive spinal disease and co-morbidities. Further research is necessary to decrease morbidity in CAS patients and establish a consensus for surgical management.
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We thank the faculty and staff of the Department of Neurological Surgery for their assistance in management of this patient and their support in drafting this manuscript.
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The authors declare that they have no conflict of interest.
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Vora, D., Schlaff, C.D. & Rosner, M.K. Surgical management of a complex case of Charcot arthropathy of the spine: a case report. Spinal Cord Ser Cases 5, 73 (2019). https://doi.org/10.1038/s41394-019-0217-5