TY - JOUR T1 - Malignant Peripheral Nerve Sheath Tumors of the Pericardium in a Patient with Neurofibromatosis Type 1: The Diagnostic Value of <sup>18</sup>F-FDG PET/CT and <sup>123</sup>I-MIBG SPECT/CT JF - Journal of Nuclear Medicine Technology JO - J. Nucl. Med. Technol. SP - 61 LP - 62 DO - 10.2967/jnmt.117.199927 VL - 46 IS - 1 AU - Mathieu Charest AU - Josephine Pressacco AU - Jaramie Thomas-Gittens Y1 - 2018/03/01 UR - http://tech.snmjournals.org/content/46/1/61.abstract N2 - A 25-y-old woman with known neurofibromatosis type 1 and a large anterior mediastinal mass was investigated. 18F-FDG PET/CT revealed a radiotracer-avid anterior mediastinal mass having an SUVmax of 4.3 and demonstrating a hypoactive center. The 123I-metaiodobenzylguanidine SPECT/CT study performed subsequently did not demonstrate any uptake, thereby excluding, for the most part, the diagnosis of paraganglioma or neuroblastoma. At final pathology, a malignant peripheral nerve sheath tumor of the pericardium with areas of chondrosarcomatous and angiosarcomatous differentiation was diagnosed. ER -