this post was submitted on 03 Aug 2023
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Radiology
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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.
I think I understand that, thank you. Your other examples are very helpful, though it took some study before I could tell the differences. Would I be right in saying that all tumors calcify, and that the level of calcification (as well as the orientation of the “tendrils”) indicates the progression of the tumor?
No they don't all calcify.
The tumor here is growing from the bone and destroying it. The normal bone cells are trying to repair by making more bone. If faster the tumor destroys and grows, the less smooth the repaired bone can look.