The same holds true for rearrangements involving NR4A3 in extraskeletal myxoid chondrosarcomas: while the AMP-FPS assay covers the most NR4A3 common partners (EWSR1, TAF15, TCF12, TFG) it lacks probes for both NR4A3 and uncommon partners (24), thus scoring negative in the presence of alternative fusions. The gene discussed is EWSR1; the disease is chondrosarcoma.