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

Oncology

Journal of Nuclear Medicine & Radiation Therapy

Author(s): Schirrmeister H, Buck AK, Bergmann L, Reske SN, Bommer M

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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. This article was published in Cancer Biother Radiopharm and referenced in Journal of Nuclear Medicine & Radiation Therapy

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