(That's right: 'Kerley B', not 'curly bee'! The reason for the silly name: Kerley was unfortunately someone's surname, and he identified three types of lines on chest X-ray, which he called A, B and C. B is the most famous, and you can basically forget about the other two.)
Kerley B lines are an X-ray finding that represents visible interlobular septa in the lung. As implied, these septa are usually invisible on X-ray, but certain conditions can fill them with radiopaque stuff.
The most common condition causing Kerley B lines is cardiac failure. In this case, the backing up of fluid in the pulmonary vasculature eventually breaches the blood vessel wall and floods the interstitium, of which the interlobular septa are a part. Alternatively, other conditions may fill the interlobular septa with different material, like fibrous tissue (in pulmonary fibrosis), cancer cells and their attendant infiltrate (e.g. carcinomatosis) or even haemosiderin (from recurrent pulmonary oedemas in which red cells made it to the interlobular septa, only to die there).
Kerley B lines are best appreciated in the lower lobes, where they are seen as transverse lines near the lung peripheries. Even at the best of times they are hard to see, however - as this supposedly 'classic' image shows. (The white arrows point to some of them, but if you are seeing any transverse white lines in the area you are probably looking at them!)
Thanks - that made much more sense than my lecturer today!!
ReplyDeleteThank you for making it very simple and easy
ReplyDeleteits great
ReplyDeleteagree with the first anonymous comment. so much more sense than my lecturer!
ReplyDeleteMan, THAT is an EXPLANATION!!
ReplyDeleteThanks man!
ReplyDeleteexcellent explanation
ReplyDeletebrilliant. thanks for this!
ReplyDeleteThanks for the explanation.
ReplyDeletenot that impressive!!
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ReplyDeleteit did help me!! thx dude!
ReplyDeleteyou are the best!
ReplyDeleteVery interesting and am able to understand...but must you make fun of someone's surname? I share this sur name and am quite proud of it!
ReplyDeleteA Kerley in TX
you did a good job down here... Tx
ReplyDeleteThey make it sound so confusing in med school but yet when you see it, it makes total sense thanks!
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ReplyDeletein ms karle's b line seen mention it....
ReplyDeletefunny..
ReplyDelete:)
ReplyDeleteThanks. Lines are not that clear in the image
ReplyDeleteYup - Kerley B lines are NEVER clear!!
ReplyDeleteThanks.
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ReplyDelete