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Extrapleural solitary fibrous tumor evidenced by68Ga-prostate-specific membrane antigen positron emission tomography/computed tomography study in the staging of a high-risk prostate cancer patient

 Department of Nuclear Medicine, A. C. Camargo Cancer Center, São Paulo, Brazil

Correspondence Address:
André Marcondes Braga Ribeiro,
Department of Nuclear Medicine, A. C. Camargo Cancer Center, Rua Professor Antônio Prudente, 211, 01509-010, Liberdade, São Paulo-SP
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/wjnm.WJNM_18_20

Positron emission tomography/computed tomography (PET/CT) using68Ga-labeled prostate-specific membrane antigen (68Ga-PSMA) became an important tool in the prostate cancer (PC) diagnosis. Despite its high sensitivity and specificity, this method may produce false-positive findings, as indicated by previous studies. This case report aims to warn nuclear medicine physicians, oncologists, and urologists about the possibility of false-positive findings using this imaging modality, especially in patients who have already been diagnosed with other malignancies. A 69-year-old man, previously treated for an extrapleural solitary fibrous tumor (ESFT), underwent staging tests after a new diagnosis of high-risk PC.68Ga-PSMA PET/CT imaging revealed an abnormal uptake in the prostate and in the right humerus. A biopsy was performed, and the pathology showed a lesion consisting of an ESFT metastasis. Diagnostic issues related to68Ga-PSMA PET/CT imaging should be disseminated to help physicians make appropriate treatment choices for each patient and avoid unnecessary procedures.

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