Added value of [18F]fluorodeoxyglucose positron emission tomography/computed tomography for the diagnosis of post-operative instrumented spine infection

Post-operative instrumented spine infection (PISI) is an infrequent complication. Diagnosis of spinal implant infection can be difficult, especially in case of chronic infection. This retrospective study attempts to evaluate the diagnostic performance of [18F]fluorodeoxyglucose positron emission tom...

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Bibliographic Details
Published in:Joint, bone, spine : revue du rhumatisme bone, spine : revue du rhumatisme, 2019-07, Vol.86 (4), p.503-508
Main Authors: Follenfant, Emilie, Balamoutoff, Nicolas, Lawson-Ayayi, Sylvie, Dutronc, Hervé, Dupon, Michel, Vital, Jean-Marc, Delobel, Pierre, Durox, Hélène, de Clermont-Gallerande, Henri, Fernandez, Philippe, Dauchy, Frédéric-Antoine
Format: Article
Language:English
Subjects:
[18F]fluorodeoxyglucose positron emission tomography/computed tomography
Adult
Aged
Analysis of Variance
C-Reactive Protein - metabolism
Cohort Studies
Female
Fluorodeoxyglucose F18
Humans
Implant
Internal Fixators - adverse effects
Life Sciences
Magnetic Resonance Imaging - methods
Male
Middle Aged
Positron Emission Tomography Computed Tomography - methods
Predictive Value of Tests
Prognosis
Retrospective Studies
ROC Curve
Santé publique et épidémiologie
Spinal Diseases - diagnostic imaging
Spinal Diseases - surgery
Spinal Fusion - adverse effects
Spinal Fusion - methods
Spine infection
Surgical Wound Infection - diagnostic imaging
Treatment Outcome
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Summary:Post-operative instrumented spine infection (PISI) is an infrequent complication. Diagnosis of spinal implant infection can be difficult, especially in case of chronic infection. This retrospective study attempts to evaluate the diagnostic performance of [18F]fluorodeoxyglucose positron emission tomography/computed tomography (PET/CT) in PISI. Imagings were performed between April 2010 and June 2018 among patients referred for suspected chronic spinal implant infection. PET/CT were performed more than 12 weeks after surgery. PET/CT images were re-interpreted independently by two nuclear medicine physicians without knowledge of the patient's conditions. PET/CT data were analyzed both visually and semi-quantitatively (SUVmax). MRI results were collected from medical records. The final diagnosis of infection was based on bacteriological cultures or a twelve-month follow-up. Forty-nine PET/CT were performed in 44 patients (22 women, median age 65.0 years). Twenty-two patients had a diagnosis of infection during follow-up. Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for PET/CT were 86.4%, 81.5%, 79.2%, and 88.0%. Sensitivity, specificity, PPV and NPV were 66.7%, 75.0%, 66.0%, 75.0% respectively for MRI and 50.0%, 92.6%, 84.6% and 69.4% for serum C-reactive protein (CRP). Although these values were higher for PET/CT than for MRI or CRP, the differences were not statistically significant. In this setting, false positives with PET/CT can be observed in case of previous spine infection or adjacent segments disc disease. False negatives can result of extensive instrumented arthrodesis or infection with low virulence bacteria. PET/CT is useful for the diagnosis of PISI. These results should be evaluated in further prospective study.
ISSN:1297-319X
1778-7254
DOI:10.1016/j.jbspin.2019.01.009