What are the symptoms of acute calcium pyrophosphate dihydrate crystal deposition (CPPD, or pseudogout)?

What are the symptoms of acute calcium pyrophosphate dihydrate crystal deposition (CPPD, or pseudogout)?

• Sudden, intense joint pain.
• Swollen joint that is warm and tender to touch.
• Red skin involving the affected joint.

Less often, CPPD may cause persistent swelling, warmth and pain in several joints, and can even mimic rheumatoid arthritis.