The translocation of COL3A1 had been reported as a rare partner fusing to PLAG1-rearranged neoplasms (including lipoblastoma and unclassified spindle cell neoplasm) and USP6-rearranged neoplasms (including cranial fasciitis, cellular fibroma of the tendon sheath, and unclassified benign myofibroblastic tumor). Here, COL3A1 is linked to spindle cell neoplasm.