Evaluation of bone mass in patients undergoing liver transplantation followed at the Endocrinology Operating Unit for Bone Mineral Metabolism, through the creation of a structured data collection in which to census all cases diagnosed and evaluated since 1/1/2009 at the U.O. Endocrinology of the S. Orsola-Malpighi Polyclinic. For the prospective phase, the expected duration of individual patient observation is 5 years

Evaluation of laboratory values related to calcium metabolism in patients undergoing liver transplantation, specifically focusing on blood levels of calcium, phosphate, parathyroid hormone (PTH), and vitamin D. These parameters will be assessed using standard laboratory tests conducted at the Endocrinology Operating Unit for Bone Mineral Metabolism. Data will be collected through a structured registry that includes all cases diagnosed and evaluated since 1/1/2009 at the U.O. Endocrinology of the S. Orsola-Malpighi Polyclinic.

Evaluation of fracture incidence in patients undergoing liver transplantation in patients undergoing liver transplantation followed at the Endocrinology Operating Unit for Bone Mineral Metabolism, through the creation of a structured data collection in which to census all cases diagnosed and evaluated since 1/1/2009 at the U.O. Endocrinology of the S. Orsola-Malpighi Polyclinic. For the prospective phase, the expected duration of individual patient observation is 5 years

This measure will assess the correlation between liver transplantation and the prevalence of fractures in patients followed at the Endocrinology Unit. Fractures will be identified through clinical records and radiological assessments. The prevalence will be reported as the percentage of patients with fractures (%) within the study population.