What are the common symptoms of feline plasma cell pododermatitis (FPLI) in cats and how is it diagnosed through testing?

Common symptoms of feline plasma cell pododermatitis (FPLI) in cats include swelling, redness, and ulceration of the paw pads, as well as lameness and pain. Diagnosis of FPLI is typically done through a combination of physical examination, biopsy of affected tissue, and blood tests to rule out other possible causes.