This invention relates to the staging, diagnosis and treatment of cancerous diseases (both primary tumors and tumor metastases), particularly to the mediation of cytotoxicity of tumor cells; and most particularly to the use of isolated monoclonal antibodies, antigen binding fragments thereof, and/or cancerous disease modifying antibodies (CDMAB), optionally in combination with one or more CDMAB, chemotherapeutic agents, and conjugates thereof, as a means for initiating a cytotoxic response to human hematologic malignancies. The invention further relates to binding assays, which utilize the isolated monoclonal antibodies, antigen binding fragments thereof, and/or CDMAB of the instant invention. The cancerous disease modifying antibodies antibodies can be conjugated to toxins, enzymes, radioactive compounds, cytokines, interferons, target or reporter moieties and hematogenous cells.