This study at IRCCS Galeazzi - Sant'Ambrogio Hospital involves patients with gout, CPPD, and osteoarthritis as a control group. Patients will receive routine care with regular clinical, laboratory, and imaging assessments every six months, alongside urgent visits as needed. The study aims to understand crystal deposits in joints and blood vessels and monitor their progression over time, assessing how these deposits respond to standard treatments and if they are associated with cardiovascular complications. Data will be collected from medical records over a follow-up period of up to 10 years, offering long-term insights into disease impact and treatment effectiveness.