FDG PET/CT in a Case of Metastasizing Pleomorphic Adenoma in the Ilium

Zhengguang Xiao; Aisheng Dong; Yang Wang; Weiwu Yao; Yushu Bai

doi:10.1097/RLU.0000000000005572

FDG PET/CT in a Case of Metastasizing Pleomorphic Adenoma in the Ilium

Clin Nucl Med. 2024 Nov 20. doi: 10.1097/RLU.0000000000005572. Online ahead of print.

Authors

Zhengguang Xiao¹, Aisheng Dong², Yang Wang³, Weiwu Yao¹, Yushu Bai⁴

Affiliations

¹ From the Department of Radiology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine.
² Department of Nuclear Medicine, The First Affiliated Hospital of Naval Medical University.
³ Department of Pathology, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine.
⁴ Department of Orthopedics, The First Affiliated Hospital of Naval Medical University, Shanghai, China.

PMID: 39774552
DOI: 10.1097/RLU.0000000000005572

Abstract

Although pleomorphic adenomas of the salivary glands are benign tumors, they can metastasize to distant organs without evidence of malignant transformation. We describe FDG PET/CT finding in a case of metastasizing pleomorphic adenoma in the right ilium occurring 22 years after initial surgical resection of a lip pleomorphic adenoma. On FDG PET/CT, the iliac metastasis appeared as an expansile osteolytic lesion with heterogeneous activity. This case indicates that metastasizing pleomorphic adenoma, although rare, should be included in the differential diagnosis of FDG-avid osteolytic bone lesions in patients with a history of salivary gland pleomorphic adenoma.