Open AccessUnusual asymptomatic fluorodeoxyglucose avid pheochromocytoma in a case of myxoid liposarcoma of the extremity on 18-F fluorodeoxyglucose positron emission tomography-computed tomography
Author(s) -
Divya Shivdasani,
Natasha Singh,
Melvika Pereira,
Anand Zade
Publication year - 2017
Publication title -
world journal of nuclear medicine
Language(s) - English
Resource type - Journals
eISSN - 1607-3312
pISSN - 1450-1147
DOI - 10.4103/1450-1147.207275
Subject(s) - medicine , fluorodeoxyglucose , positron emission tomography , soft tissue , radiology , pheochromocytoma , context (archaeology) , liposarcoma , asymptomatic , myxoid liposarcoma , metastasis , pathology , sarcoma , cancer , paleontology , biology
Sarcomas are a heterogeneous group of rare tumors and arise either from soft tissue or from bone. Soft-tissue sarcomas (STSs) initially metastasize to the lungs. Metastases to extrapulmonary sites such as liver, brain, and soft tissue distant from primary tumor usually develop later. However, cases with isolated adrenal metastasis without disseminated disease have been reported in literature. We present a case of primary myxoid liposarcoma of the lower limb, in which staging 18 -F fluorodeoxyglucose positron emission tomography-computed tomography (FDG PET-CT) scan detected a suspicious FDG avid adrenal lesion which eventually on resection was diagnosed as asymptomatic pheochromocytoma. Pheochromocytomas have been reported to demonstrate FDG uptake mimicking metastasis. Hence, while interpreting FDG PET-CT scans in the context of STSs, both the extrapulmonary metastatic potential of aggressive histological subtypes of sarcoma and rare possibility of FDG avid coexistent benign tumor should be taken into consideration.