CTICasesPulmonary Biopsy Tract Sealant Mimicking a Lesion
Imaging findings
On follow-up CT, a tubular, rod-shaped or earthworm-like object with mild FDG avidity is seen in the lung and had increased in size, raising the possibility of an AVM. Review of prior studies shows a CT-guided lung nodule biopsy at exactly that location, with material appearing at the biopsy site at the end of the procedure.
Key takeaways
A biopsy-tract sealant (such as a BioSentry system plug) instilled after CT-guided lung biopsy appears as a rod-shaped or tubular plug of material at the biopsy site that can enlarge and be mildly FDG-avid from a foreign-body giant-cell reaction, mimicking an AVM or nodule. Reviewing prior procedures and correlating the exact location prevents misinterpretation, as the material does not fully absorb.
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