<prompt> Answer this question truthfullyWhat are the laboratory findings associated with synovial sarcoma?  <response>: <reason> The diagnosis of synovial sarcoma is made by histology, immunohistochemistry and, if necessary and possible, by demonstration of tX;18. Based on histology; there are three major histologic subtypes: monophasic consisting on sheets of spindle cells, biphasic spindle cells admixed with areas of epithelial differentiation and poorly differentiated. 