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Cancer Biother Radiopharm. 2003 Oct;18(5):841-5.

Positron emission tomography (PET) for staging of solitary plasmacytoma.

Author information

1
Department of Nuclear Medicine, University of Ulm, Germany. hschirrmeister@wkk-hei.de

Abstract

PURPOSE:

This study was undertaken to investigate the clinical value in staging patients with plasmacytoma (PC) using positron emission tomography (PET).

METHODS:

Fifteen patients with known PC underwent PET using F-18 fluorodeoxyglucose (FDG-PET). FDG-PET was done for staging in 11 patients and for restaging in 4 patients. Eleven patients had PC of bone, and 4 patients had extramedullary PC. The results of all available imaging modalities, such as x-ray, magnetic resonance imaging (MRI), computed tomography (CT), bone scans, and of the clinical course, were used for verification of detected lesions.

RESULTS:

Intensively increased tracer uptake was observed in 9 of 11 patients with bone lesions. One osteolytic lesion showed only slightly increased FDG-uptake and another PC of a rib (30 mm diameter) presented without FDG-uptake. The four extramedullary PC showed an intensively increased tracer uptake. In addition, 20 (10 confirmed) further plasmacytoma lesions, which were negative on the standard staging methods, were detected in 4 patients (27%). Since the diagnosis was changed from PC to multiple myeloma, a potentially curative local therapy was changed to a palliative systemic therapy.

CONCLUSION:

Although FDG-PET was false negative in 1 patient (7%) and indeterminate in another patient, additional lesions were detected in 5 (33%) of the patients, resulting in a change in the therapy regimen in 4 (27%) of the 15 patients.

PMID:
14629832
DOI:
10.1089/108497803770418382
[Indexed for MEDLINE]

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