›Score 9–11: predicted survival 6–12 months — palliative or excisional surgery
›Score 12–15: predicted survival >12 months — excisional surgery may be considered
›NOMS framework (Neurologic, Oncologic, Mechanical, Systemic)
›Structured decision framework integrating tumor biology and mechanical stability
›Neurologic: degree and rate of deficit
›Oncologic: tumor radiosensitivity (radiosensitive vs. radioresistant)
›Mechanical: SINS score for stability
›Systemic: overall cancer burden and treatment tolerance
›MRI entire spine with and without gadolinium
›Gold standard for MSCC diagnosis
›Sensitivity 44–93%, specificity 90–98% for epidural cord compression
›NCCN recommends entire spine imaging regardless of clinical level
›Must image entire spine — 15–20% have additional lesions at other levels
›Up to one-third of patients have multiple noncontiguous levels of involvement
›Urgency: obtain within 24 hours of symptom onset; emergent if acute deficit
›MRI sequences and interpretation
›T1 — vertebral body marrow signal: hypointense in tumor infiltration
›Loss of normal fatty marrow signal
›T2 — cord signal: hyperintensity indicates edema or myelomalacia
›T2 cord signal change correlates with severity and prognosis
›STIR — highly sensitive for marrow edema and tumor infiltration
›Useful when gadolinium is contraindicated
›Post-gadolinium T1 — differentiates tumor from abscess (ring enhancement vs. homogeneous)
›Leptomeningeal disease: linear enhancement over cord surface
›Epidural Spinal Cord Compression Scale (ESCC)
›Six-point grading of epidural disease on axial MRI
›Grade 0: bone only, no epidural disease
›Grade 1a: epidural impingement without thecal sac deformation
›Grade 1b: thecal sac deformation without cord contact
›Grade 1c: cord contact without cord compression
›Grade 2: cord compression with CSF visible around cord
›Grade 3: cord compression, no CSF visible; ESCC 3 = highest risk
›CT spine
›Indications and role
›MRI contraindicated (pacemaker, ferromagnetic implants) — CT myelogram alternative
›Superior bone detail: pathologic fracture assessment, cortical destruction
›Surgical planning: pedicle screw placement, vertebral body integrity
›CT chest/abdomen/pelvis
›Staging and unknown primary workup
›Lung cancer — most common unknown primary to present with MSCC
›CT myelogram
›Sensitivity and specificity equivalent to MRI when MRI contraindicated
›Intrathecal contrast injection; invasive; risk of post-procedure headache
›Bone windows interpretation
›Lytic lesion — bone destruction; renal, thyroid, lung, breast cancer
›Greatest instability risk with >50% vertebral body involvement
›Blastic lesion — bone formation; prostate cancer, carcinoid
›More mechanically stable than lytic lesions
›Mixed pattern — lung, breast cancer
›Ultrasound in MSCC evaluation
›Limited direct role for spinal cord assessment
›Spinal cord not accessible to ultrasound in adults beyond neonatal period
›Bladder ultrasound — essential
›Postvoid residual measurement to assess for neurogenic bladder
›PVR >150 mL indicates retention requiring catheterization
›Intraoperative ultrasound
›Used during laminectomy to confirm adequacy of cord decompression
›Real-time guidance for tumor resection margins
›FAST and point-of-care ultrasound
›Not a primary diagnostic modality for MSCC
›Useful to evaluate hemodynamically unstable patients for concurrent pathology
›DVT assessment in lower extremities — high VTE risk in immobilized MSCC patients