You're speaking with Dr. Michael Salkin. If I'm not out hiking I'm chained to my computer by evil gnomes. What's up "Customer"?
I understand your concern. Osteosarcoma is uncommon in cats and would be expected to cause progressively worsening and unabating intractable pain. She doesn't sound like a cat with such a terrible cancer. She may have been digging at that area because it hurt but I would wonder why she isn't continuing to do so if she's still hurting. I agree with you; X-rays are indicated - not only of that limb but shoulder blade and cervical spine. A dorsal root signature sign (similar to sciatica but in the front rather than rear limb) radiates down the limb and so the problem may reside in her cervical (neck) spine rather than extremity.
In most cases, geriatric osteoarthritis is found in a 10 year old cats such as she. I suspect that you're going to see a nice response to the steroid. Please continue our conversation if you wish.
Yes, sprains and strains need to be considered. Very difficult to confirm, however. You don't need to go to the ER with her. I can't imagine anything of an emergency nature. I can't set a follow-up in this venue so please return to our conversation - even after rating - with an update at your convenience. You can bookmark this page for ease of return.
Thank you for your kind accept. I appreciate it, Jess.