Based upon the suggestion that a fusion of these genes through the translocation would result in overexpression of CSF1 due to a strong COL6A3 promoter, we performed RT-PCR on six TGCT cases with t(1;2) to search for a putative COL6A3-CSF1 fusion gene.     ///    Molecular identification of COL6A3-CSF1 fusion transcripts in tenosynovial giant cell tumors.. 