Table 2.

Summary of the evaluation of FBSS

	Evaluation of FBSS
Detailed history and clinical examination	Compare preoperative symptomatology to the current one
	Look for radicular pain vs. centralization
	Red flags (organic signs and symptoms)
	Yellow flags (psychological stressors)
	Waddell signs
Laboratory studies	Complete blood count, C-reactive protein, and erythrocyte sedimentation rate
	Plain X-ray and dynamic, whole-spine anteroposterior, and lateral X-ray
	Gadolinium-enhanced magnetic resonance imaging
	Computed tomography scan+reconstruction
	Facet injection±myelography

FBSS, failed back surgery syndrome.