Since synovial sarcoma, solitary fibrous tumor, malignant peripheral nerve sheath tumor and osteosarcoma are among the potential differential diagnoses of BCOR-rearranged sarcomas, the detection of BCOR gene rearrangement is very important in the diagnostic appraisal of this lesion, particularly in needle core biopsies [9]. The gene discussed is BCOR; the disease is malignant peripheral nerve sheath tumor.