PTP4A3 and soft tissue sarcoma: Among pediatric sarcomas, PRL3 was present in osteosarcoma (4 of 8, 50%), rhabdomyosarcoma and non-rhabdomyosarcoma soft tissue sarcomas (NRSTSs) (5 of 7, 71%), and renal sarcomas of infancy (3 of 5, 60%) (Figure 2B).