Chimeric JAZF1-JJAZ1 mRNA transcribed from DNA spanning the site of recombination in the (7;17)(p15;q21) chromosomal translocation found in half of endometrial stromal sarcomas and most cases of benign stromal nodules is one such example.     ///    The JAZF1-JJAZ1 mRNA and the protein encoded by it appear to be identical to that synthesized from the gene fusion in neoplastic cells.     ///    The recent finding that chimeric JAZF1-JJAZ1 mRNA can also be detected in normal endometrial stromal cells suggests that chimeric gene products are not limited to cancer or pre-cancerous cells. 