The aim of this research protocol is to evaluate the adherence to the Mediterranean diet in patients suffering from recurrent kidney stones and osteometabolic diseases. Results of the study will allow to assess the dietary habits of patients with the above diseases. Given the universal prevalence of nephrolithiasis and osteometabolic diseases, the knowledge of these data appears crucial for the proper management of the dietary approach to prophylaxis secondar

Inclusion Criteria:

• Patients with idiopathic relapsing nephrolithiasis with evidence instrumental of bilateral renal stones or emission of more than one stone in the past 5 years

Exclusion Criteria:

• Patients who had albumin-corrected plasma calcium levels > 11.0 mg/dl at the time of the first determination of serum levels of 25 OH vitamin D;
• Patients who had glomerular filtration rate < 60 mL/min/1.73 m2;
• Patients who had positive personal history of chronic granulomatous disease;
• pregnancy patients;
• Positive personal history for morphological abnormalities of the excretory system;
• incomplete data collection.

Patients with idiopathic relapsing nephrolithiasis with evidence instrumental of bilateral renal stones or emission of more than one stone in the past 5 years