B-lines (ultrasound)

Case contributed by Dr Balint Botz


Long-standing type 2 diabetes, chronic renal insufficiency and hypertension.

Patient Data

Age: 75 years
Gender: Male
  • Bilateral pleural effusion with resultant compression atelectasis.
  • Multiple vertical, often confluent streak-like hyperechogenic artefacts are visible around the lung base, arising from the pleural surface, and reaching the border of the scan field, which correspond to B-lines.

B-lines are transient and rapidly changing phenomenon, which can be better appreciated in the cine recording. 

Case Discussion

B-lines can be occasionally observed under normal circumstances around the base of the lung. Here, the moderately increased number of these artefacts (3-4/intercostal space) likely corresponds to interstitial fluid accumulation due to the compression caused by the pleural effusion, and also due to chronic heart failure. 

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Case information

rID: 65567
Published: 16th Jan 2019
Last edited: 14th Aug 2019
System: Chest
Inclusion in quiz mode: Included
Institution: University of Pécs

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