Degenerative Spondylolisthesis

(SBQ18SP.1) When discussing with a patient the surgical treatment options for the condition seen in Figure A you are asked about the addition of an interbody spacer compared to posterior spinal fusion (PSF) alone. You state that the scientific evidence shows the use of an interbody fusion for this condition leads to which of the following?

(OBQ13.111) A 44-year-old male presents with pain in the posterior aspect of his left thigh after walking more than 20 feet. Figures A demonstrates an upright lateral lumbar spine radiograph. There is 3mm of translation on flexion and extension radiography. Figure B is a sagittal MRI image and Figure C is an axial image through L4-5. He has failed non-operative treatment and elects to undergo surgery. Assuming he undergoes the appropriate surgery, which of the following places him at the highest risk for adjacent segment disease requiring future surgery?

(OBQ13.7) A 70-year-old woman is seen back in follow-up in your clinic with persistent shooting pains down the back of her legs, which have been increasing over the last nine months. She can walk for about 3 minutes before the pain becomes unbearable. It is relieved only when she sits down or bends forward. Her neurological exam demonstrates difficulty with heel-walking and normal patellar tendon reflexes bilaterally. Pedal pulses are present. Figures A and B show a lateral x-ray and a sagittal MRI of her lumbar spine. She has failed all previous conservative management and would like to proceed with surgery. What is the most appropriate treatment?

(SBQ12SP.48.1) A 62-year-old female undergoes the procedure shown in Figure A. According to the most recent evidence, what is the overall probability that the patient will need additional lumbar surgery for adjacent segment degeneration (ASD) within 10 years after this type of surgery (without consideration of number of levels involved at index procedure)?

(SBQ12SP.9) A 62-year-old male underwent posterior spinal instrumented fusion for degenerative lumbar spondylolithesis one year ago. He presents to office complaining of persistent lower back pain. The pain initially improved but over the last 6 months he has had recurring pain at the site of the surgery primarily with activity. He denies back pain at rest or night pain. Physical examination reveals a well healed wound and no physical abnormalities. He has no tenderness to palpation to the thoracic or lumbar spine. He has no neurological deficits. His laboratory results show an erythrocyte sedimentation rate (ESR) = 8 mm/h and C-reactive protein (CRP) = 3 mg/L at the last visit which are both within normal limits. Figure A shows a series of radiographs from his pre-operative, 3 month post-operative and 1 year post-operative clinic visits, respectively. Which of the following investigations would best confirm the suspected underlying diagnosis?

(SBQ12SP.4) A 65-year-old male presents for postoperative follow up after undergoing spinal surgery. His preoperative and postoperative radiographs are shown in Figure A and B respectively. His past medical history is significant for osteoarthritis, hypertension, and smoking 1.5 packs per day for greater than 35 years. Which variable in this patient’s history has been reported to be associated with lower functional outcomes after this surgery?

(OBQ12.5) A 57-year-old woman with a past medical history of diabetes mellitus and arrythmias, requiring prior insertion of a pacemaker, presents with severe bilateral leg pain for 12 months. She reports the symptoms are worse with prolonged walking and improved with sitting. The severity of her symptoms has led her to exercise primary on a stationary bicycle, which she reports does not cause her symptoms. On physical exam she is neurologically intact in her lower extremities. She has an ABI of 0.95. A flexion and extension radiograph is performed and shown in Figure A. An axial CT myelogram at the L4/5 level is shown in Figure B. Extensive nonoperative treatment with therapy and epidural steroid injections have failed to provide any relief of her symptoms. What would be the most appropriate next step in treatment?

(OBQ11.37) A 71-year-old male presents with bilateral leg pain for the last two years. His pain is exacerbated when walking and is relieved when his sits or bends forward. He notes occasional periods where his legs feel weak, but motor examination reveals 5/5 motor strength throughout his bilateral lower extremities. He has diminished sensation on the medial aspect of his feet bilaterally. Management thus far has included NSAIDS with occasional narcotic usage, physical therapy, and two epidural steroid injections. Figure A shows a flexion radiograph, Figure B shows an extension radiograph, and Figures C and D show his current MRI scan. He feels his pain is substantially worse than it was one year ago. What is the most appropriate management at this time?

(OBQ10.143) A 59-year-old male presents with worsening bilateral buttock and leg pain that is worse with prolonged standing and improves with sitting. His symptoms have worsened to the point that it is now difficult for him to walk small distances. Physical exam shows weakness to EHL on the right. A magnetic resonance image is shown in Figure A. Nonsurgical management, including epidural corticosteroid injections, has failed to relieve the patient’s symptoms. What is the most appropriate next step in management?

(SBQ09SP.13) A 60-year-old male former professional bodybuilder presents with chronic progressive lower back and bilateral thigh pain. He currently smokes 1 pack per week. Physical exam is remarkable for midline tenderness and a positive ipsilateral left-sided straight-leg raise. Radiographs are shown in Figures A and B. The patient elects to undergo multilevel decompression and fusion for this condition and is able to quit smoking post-operatively. Which of the following is accurate regarding the risk of nonunion in this patient following surgery?

(OBQ09.66) A 62-year-old female presents with one year of severe back and bilateral buttock pain. Her symptoms are worse with walking and improve with sitting. She now finds it difficult to walk even small distances, such as to her mailbox. Six months of nonoperative management including physical therapy, oral medications, and epidural corticosteroid injections have failed to provide lasting relief of her symptoms. Flexion and extension lateral radiographs are shown in Figures A and B. Sagittal and axial MRI images are shown in Figure C and D. What is the next most appropriate step in mangement?

(OBQ07.56) A 47-year-old male underwent L4-5 posterior lumbar decompression and fusion with instrumentation. At the six-week clinical visit he complains of pain in the region of his wound. On physical exam there is wound erythema but no exudate. Laboratory studies show an erythrocyte sedimentation rate of 78 mm/h (normal up to 20 mm/h) and WBC count of 11,200/mm3 (normal 3,500 to 10,500/mm3). An MRI is perfomed and shows a fluid collection dorsal to the thecal sac. What is the most appropriate next step in management?

(OBQ05.24) A 60-year-old male presents with severe low back pain and pain and numbness in his buttocks with prolonged standing. His pain improves with forward bending. Lateral radiographs with flexion and extension reveal L4/5 spondylolisthesis with mobility. MRI shows significant spinal stenosis. Six months of nonoperative management, including epidural corticosteroid injections has failed. The next step in treatment should consist of?

(OBQ04.16) In patients with degenerative spondylolisthesis undergoing posterolateral fusion, use of pedicle screws has been shown to confer which of the following effects?