Female in her 30s with painful left shoulder.

[Left]: X-ray shows a mass arising from the left proximal humerus and extending into the adjacent shoulder soft tissues with really aggressive periosteal reaction (“hair on end”). The proximal humerus itself is also heterogeneous with lucent areas. The lateral surface of the upper humerus shows “saucerization,” where the cortex is thinned out and looks like a saucer seen on edge.

[Middle]: MRI IR sequence shows a hyperintense bony mass with large soft tissue component.

[Right]: MRI postcontrast T1 IDEAL shows that the mass is enhancing.

This turned out to be high-grade surface osteosarcoma.

  • Spectator@lemmy.worldOPMEnglish
    1·
    1 year ago

    Hi. Try to match the outline of the humerus to that on the radiograph. Then the big bright mass to the right of the humerus (going by the picture) is the cancer. Now see if you can make out the rough outline of it on the radiograph.

    The cloudiness you’re seeing is calcification within the tumor. Specifically, the outward “tendrils” (as someone else called it) exploding out from the margin of the humerus is really aggressive periosteal reaction, which I’ve posted a few examples before already: one, two.