Mean hepcidin concentration was significantly lower in 10 patients with iron deficiency anemia (15.7 μg/L, p<0.010) and 7 patients with juvenile hemochromatosis (12.8 μg/L, p<0.010) and significantly higher in 7 untreated patients with Hodgkin's lymphoma and B-symptoms (116.7 μg/L, p<0.010), compared to age-matched healthy controls (42.7 μg/L), as shown in Fig. 3. The gene discussed is HAMP; the disease is hemochromatosis type 2.