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Retroperitoneal Pelvic Solitary Fibrous Tumor With High Tracer Uptake in 68Ga-DOTATOC PET/CT

A Rare Differential Diagnosis of Paraganglioma

Thuillier, Philippe, MD*; Risson, Jean-Romain, MD; Eusen, Yves, MD; Uguen, Arnaud, MD, PhD§; Abgral, Ronan, MD, PhD

doi: 10.1097/RLU.0000000000002540
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We report the case of a 27-year-old woman referred to our department for the characterization of a 7 × 6-cm left ischio-anal fossa mass by Ga-DOTATOC PET/CT. Several diagnoses were previously mentioned, in particular, myxoid sarcoma but also pelvic paraganglioma. Urinary methoxylated derivates and blood chromogranin A tests were negative. PET/CT showed a high Ga-DOTATOC uptake of the mass that was strongly consistent with paraganglioma diagnosis. Histopathological analysis surprisingly revealed a solitary fibrous tumor without aggressive criteria.

From the Departments of *Endocrinology,

Radiology,

Oncology,

§Pathology, and

Nuclear Medicine, University Hospital of Brest, Brest, France.

Received for publication December 19, 2018; revision accepted February 3, 2019.

Conflicts of interest and sources of funding: none declared.

R.A. is the guarantors of the article. P.T., A.U., Y.E., and J.R.R. drafted the manuscript. R.A. revised the manuscript. All authors contributed in drawing up the manuscript.

Correspondence to: Philippe Thuillier, MD, Department of Endocrinology, University Hospital of Brest, Boulevard Tanguy Prigent, 29609 Brest Cedex, France. E-mail: philippe.thuillier@chu-brest.fr.

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