CTICasesBioseal Tract mimicking Paragonimiasis
Imaging findings
CT chest shows a linear, beaded, 'worm-like' opacity along a previous needle biopsy tract in the right lower lobe, mimicking a parasitic tract (paragonimiasis) or tumor seeding.
Key takeaways
The BioSeal or Biocentric hydrogel plug is an iatrogenic sealant used to close lung biopsy tracts and prevent pneumothorax. On post-procedure CT, the gel plug appears as a linear, beaded opacity along the biopsy path. Recognizing this normal post-procedure appearance is important to avoid misdiagnosing active infection or tumor seeding.
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