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Updated: Jun 29, 2026
Positron Emission Tomography Imaging for In Vivo Measuring of Myelin Content in the Lysolecithin Rat Model of Multiple Sclerosis
Published on: February 28, 2021
PET scan in clinically suspected paraneoplastic neurological syndromes: a 6-year prospective study in a regional
M Hadjivassiliou1, S J Alder, E J R Van Beek
1Department of Neurology, Royal Hallamshire Hospital, Sheffield Teaching Hospitals, NHS Trust, Sheffield, UK. m.hadjivassiliou@sheffield.ac.uk
Background:
The role of PET in the diagnosis of paraneoplastic neurological syndromes (PNS) has previously been reported in retrospective studies, from specialized neuro-oncology units, often selecting patients with positive paraneoplastic antibodies.
Objectives:
To prospectively assess the usefulness of PET in detecting malignancy in patients clinically suspected of having PNS.
Methods:
PET was performed in patients suspected of PNS within 4 weeks of the normal CT body scan. All patients were followed up.
Results:
Eighty patients suspected of having PNS underwent PET. 18/80 (23%) were abnormal and suspicious of malignancy. The total number of definite and probable PNS with abnormal PET was 11/18 (61%). The total number of definite and probable PNS with a normal PET was 3/62 (5%). Only 50% of patients with biopsy-proven malignancy were positive for paraneoplastic antibodies. The prevalence of abnormal PET in patients presenting with classical PNS was 41% as opposed to 21% in patients with non-classical PNS. The sensitivity and specificity of PET in diagnosing PNS was 75% and 87% respectively.
Conclusions:
PET is a valuable tool in clinically suspected PNS. Its use should not be restricted to specialized neuro-oncology units or in patients with positive paraneoplastic antibodies. Positive yield is the highest amongst patients with classical PNS.
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