RT Journal Article
SR Electronic
T1 Establishing a Gold Standard for Noninvasive Identification of Painful Lumbar Discs: Prospective Comparison of Magnetic Resonance Spectroscopy vs Low-Pressure Provocation Discography
JF International Journal of Spine Surgery
JO Int J Spine Surg
FD International Society for the Advancement of Spine Surgery
SP 91
OP 100
DO 10.14444/8574
VO 18
IS 1
A1 Gornet, Matthew G.
A1 Peacock, James
A1 Ryken, Timothy
A1 Schranck, Francine W.
A1 Eastlack, Robert K.
A1 Lotz, Jeffrey C.
YR 2024
UL https://www.ijssurgery.com/content/18/1/91.abstract
AB Purpose Verifying lumbar disc pain can present a clinical challenge. Low-pressure provocative discography (PD) has served as the gold standard, although it is invasive and often a challenge to interpret. We reported that magnetic resonance spectroscopy (MRS) biomarkers accurately predict PD results in lumbar discs and improved outcomes for patients with surgery at positive MRS levels versus nonsurgery. To further substantiate MRS for diagnosing painful discs, we report a prospective comparison of 2 MRS-derived measures: NOCISCORE (pain) and SI-SCORE (degeneration severity).Methods Lumbar MRS and software-based postprocessing (NOCISCAN-LS, Aclarion Inc.) was performed in 44 discs in 14 patients (prospective cohort [PC]). PC data were compared to prior data used to establish the NOCISCORE (training cohort [TC]). The NOCISCORE was converted to an ordinal value (high/intermediate/low; NOCI+/mild/–) and compared against painful (P) versus nonpainful (NP) control diagnosis (PD) for 19 discs where PD was performed in the PC (12 NP; 7 P). Sensitivity, specificity, and positive and negative predictive values were calculated. The SI-SCORE was compared against MRI Pfirrmann Grades for 465 discs in 126 patients (PC plus TC).Results For the PC, MRS (NOCI+/–) compared to PD (P/NP) with an accuracy of 87%, sensitivity of 100%, and specificity of 80%. The positive predictive value (PPV) in herniated discs, and negative predictive value (NPV) in non-herniated discs, were 100%. NOCISCOREs were significantly higher for PD+ versus PD– discs for PC and TC (P < 0.05), and the NOCISCORE distributions for PD+/– group were not statistically different between the PC and TC (P > 0.05). SI-SCORES differed between Pfirrmann Grades 1 and 2 (less degenerated) versus Grades 3 and 4 (more degenerated; P < 0.05), with a progressively decreasing trend with Pfirrmann Grades 1–5.Conclusion These current data provide prospective confirmation of the predictive value of disc MRS for distinguishing painful discs and for assessing the disc structural integrity.Clinical Relevance NOCISCAN is an adoptable, noninvasive, and objectively quantitative test to improve management of low back pain patients.Level of Evidence 2.