The present invention relates to a kind of for treating and/or diagnosing microvesicle of the use from cell of cancer. In addition, using cell-derived microvesicle in the treatment of cancer the present invention provides the therapeutic agent of a kind of increase cancer curative effect and reduction side effect. In addition, the present invention provides a kind of the advantages that cell-derived microvesicle delivering drug to target cell or tissue that load a drug treats or diagnoses the illness.
