Successful in mice study and may be relevant for synovial sarcoma:
Here is the abstract of a publication that explains a bit more how it works:
http://www.ncbi.nlm.nih.gov/pubmed?term=Patterson%20L.%20colchicine
It may be relevant for synovial sarcoma because at least one of the synovial sarcoma cell lines expresses this MT1-MMP:
http://www.ncbi.nlm.nih.gov/pubmed/15038780