Endocrine Function During Deferasirox Therapy

Inclusion Criteria: * Adult and pediatric patients with transfusion---dependent thalassemia; * Chelation with deferasirox as assigned chelation therapy; * Available medical history including relevant clinical data (age at start of transfusion regimen, age at start of chelation therapy, prior chelation therapy, concomitant diseases and concomitant treatments, including hormonal replacement treatments if appropriate) and laboratory data (e.g TSH, FT3 and FT4, fasting serum glucose, OGTT serum glucose, bone mineral density z---score, T---score, g/cm2, PTH, FSH, LH, testosterone and estradiol, serum ferritin, liver function tests,renal function tests, MRI T2\* value) at baseline and at the end of study Exclusion Criteria: * Non transfusion- dependent patients; * Other chelation therapy than deferasirox or combination with other chelators during the observation; * Absence of complete medical history as above specified