humeral head lesion

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Hi,

42 y/o.
Prior history: left shoulder pain 6 months, no acute trauma, two injections unhelpful.
MRI 5/2020
CT now

Can you make sense of this?
Filling or remodelling of a subchondral pseudocyst? I barely see it on CT.

Björn

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2 thoughts on “humeral head lesion”

  2. OCAD

    Thank you to everyone who replied, here are the results:

    1x traction cyst

    3x enchondroma

    1x chondroblastoma

    1x fibro-osseous lesion

    I think the CT features don’t fit enchondroma or any cyst very well. If we assume there is fine disperse internal matrix, I would probably favour chondroblastoma (Phil) or due to the metaphyseal location chondromyxoidfibroma.

    I recommended FU in 6-12 month.

    Björn

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