Paget Disease of Bone 5, Juvenile-Onset, also known as juvenile paget disease, is related to paget's disease of bone and secondary hyperparathyroidism. An important gene associated with Paget Disease of Bone 5, Juvenile-Onset is TNFRSF11B (TNF Receptor Superfamily Member 11b), and among its related pathways/superpathways are Cytokine Signaling in Immune system and TNFR1 Pathway. Affiliated tissues include bone, and related phenotypes are macrocephaly and bowing of the long bones