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Automated Preparation of [68Ga]Ga-3BP-3940 on a Synthesis Module for PET Imaging of the Tumor Microenvironment
Published on: April 25, 2025
18F-FAPI-04 PET/CT Imaging of Rare Brain Metastasis from Myxoid Pleomorphic Liposarcoma
Yong Wang1, Kelin Wang1, Dongfang Meng1
1Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117 China.
Abstract:
This study reports the first case of solitary brain metastasis from myxoid pleomorphic liposarcoma (MPLS) evaluated using 18F-FAPI-04 PET/CT. The imaging revealed a distinct "Halo Sign," reflecting the infiltration characteristics of cancer-associated fibroblasts (CAFs) within this rare tumor type. These findings highlight the utility of 18F-FAPI-04 PET/CT in characterizing tumor heterogeneity and underscore its potential to improve the diagnosis of rare brain metastases while informing future therapeutic strategies.
Insights
This study details the first solitary brain metastasis from myxoid pleomorphic liposarcoma (MPLS) using 18F-FAPI-04 PET/CT. The imaging identified a "Halo Sign," aiding diagnosis of rare brain tumors.
Area of Science:
- Oncology
- Radiology
- Molecular Imaging
Background:
- Myxoid pleomorphic liposarcoma (MPLS) is a rare soft tissue sarcoma.
- Brain metastases from MPLS are exceptionally uncommon.
- Accurate characterization of rare metastases is crucial for treatment planning.
Purpose of the Study:
- To report the first case of solitary brain metastasis from MPLS.
- To evaluate the utility of 18F-FAPI-04 PET/CT in imaging this rare metastasis.
- To investigate the imaging characteristics, including the "Halo Sign," associated with MPLS brain metastasis.
Main Methods:
- A single patient with a solitary brain lesion was investigated.
- The lesion was evaluated using 18F-FAPI-04 Positron Emission Tomography/Computed Tomography (PET/CT).
- Imaging findings were analyzed for specific characteristics related to tumor infiltration.
Main Results:
- The study identified a solitary brain metastasis from MPLS.
- 18F-FAPI-04 PET/CT revealed a distinct "Halo Sign" in the metastasis.
- The "Halo Sign" was attributed to the infiltration of cancer-associated fibroblasts (CAFs).
Conclusions:
- 18F-FAPI-04 PET/CT is a valuable tool for characterizing rare brain metastases like MPLS.
- The observed "Halo Sign" provides insights into tumor heterogeneity and fibroblast infiltration.
- This imaging approach may improve the diagnosis and inform therapeutic strategies for rare brain metastases.
