Fanconi Anemia/pathology; Liver Diseases/pathology; Liver/pathology; Adenoma/diagnostic imaging; Adenoma/epidemiology; Adenoma/etiology; Adenoma/pathology; Adolescent; Adult; Alanine Transaminase/blood; Androgens/adverse effects; Androgens/therapeutic use; Aspartate Aminotransferases/blood; Biopsy; Carcinoma, Hepatocellular/diagnostic imaging; Carcinoma, Hepatocellular/epidemiology; Carcinoma, Hepatocellular/etiology; Child; Child, Preschool; Cholangiopancreatography, Magnetic Resonance; Fanconi Anemia/blood; Fanconi Anemia/complications; Fanconi Anemia/diagnostic imaging; Fanconi Anemia/drug therapy; Fatty Liver/diagnostic imaging; Fatty Liver/epidemiology; Fatty Liver/etiology; Fatty Liver/pathology; Female; Follow-Up Studies; Hepatocytes/pathology; Hepatomegaly/diagnostic imaging; Hepatomegaly/epidemiology; Hepatomegaly/etiology; Hepatomegaly/pathology; Humans; Incidence; Infant; Iron Overload/epidemiology; Iron Overload/etiology; Iron Overload/pathology; Liver/diagnostic imaging; Liver/enzymology; Liver Diseases/blood; Liver Diseases/diagnostic imaging; Liver Diseases/enzymology; Liver Diseases/etiology; Liver Neoplasms/diagnostic imaging; Liver Neoplasms/epidemiology; Liver Neoplasms/etiology; Liver Neoplasms/pathology; Male; Obesity/complications