Multimodality Imaging Features of a Misleading Sacral Giant Cell Tumor in 18F-FDG PET/CT, Bone Scan, and MRI.

Date publication

octobre 2020

Journal

Clinical nuclear medicine

Auteurs

Membres identifiés du Cancéropôle Est :
Dr JOUANNAUD Christelle

Tous les auteurs :
Dejust S, Jallerat P, Soibinet-Oudot P, Jouannaud C, Morland D

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/32604109

Résumé

We report the case of an asymptomatic 66-year-old woman referred for initial staging of an invasive ductal breast carcinoma. Initial workup incidentally revealed a bone tumor of right sacral wing corresponding to a giant cell tumor (GCT). We present the imaging characteristics of GCT on Tc-HDP bone scan (doughnut sign), F-FDG PET/CT (intense and heterogeneous uptake of a prominent geographic lytic lesion with partial rupture of cortical), and MRI (hyposignal with gadolinium enhancement on T1-weighted images and heterogeneous hypersignal on T2-weighted images). GCT is a benign but locally aggressive primary bone tumor, constituting a pitfall and diagnostic challenge.

Mots clés

Aged, Bone Neoplasms, diagnostic imaging, Female, Fluorodeoxyglucose F18, Giant Cell Tumors, diagnostic imaging, Humans, Magnetic Resonance Imaging, Positron Emission Tomography Computed Tomography, Sacrum, diagnostic imaging

Référence

Clin Nucl Med. 2020 Oct;45(10):800-801