Accumulation of FDG in central venous catheter mimicking lymph node metastasis (PET CT)
PET CT was performed for routine surveillance of colon cancer.
Loading Stack -
0 images remaining
PET CT showing an FDG avid lesion in the right atrium at the tip of the port-a-cath with no anatomic abnormality seen on the corresponding CT images.
The patient received radiotracer into the port-a-cath as their was poor intravenous access.
This should not be called a metastasis.
Differential for intense FDG activity in the port includes infection, inflammation, FDG stasis, FDG emboli, and thrombus which can be either FDG-avid or photopenic.
Caveat: avoid FDG injection via a port as much as possible.
- 1. Bhargava P, Kumar R, Zhuang H, Charron M, Alavi A. Catheter-related focal FDG activity on whole body PET imaging. (2004) Clinical nuclear medicine. 29 (4): 238-42. Pubmed
- 2. Michael S. Gossman, Huaiyu Zheng, John G. Evans, Junling Li, Chin K. Ng. Assessment of radiopharmaceutical retention for vascular access ports using positron emission tomography imaging. (2017) Journal of Applied Clinical Medical Physics. 18 (6): 244. doi:10.1002/acm2.12196 - Pubmed
- 3. Siösteen AK, Celsing F, Jacobsson H. FDG uptake in a catheter-related thrombus simulating relapse of lymphoma. (2005) Clinical nuclear medicine. 30 (5): 338-9. Pubmed
- 4. Meka M, Depuey EG, Bhargava P. Focal FDG Activity in the Region of Right Atrium: Coregistered CT Identifies Three Benign Etiologies. (2008) Radiology case reports. 3 (1): 120. doi:10.2484/rcr.v3i1.120 - Pubmed