Abstract: The present invention relates to pharmaceutical compositions for the treatment of an epithelial tumor in a human, said pharmaceutical composition comprising an IgG1 antibody specifically binding to human CEA, wherein the variable region of said IgG1 antibody comprises at least (i) a CDR-H1 having the amino acid sequence “SYWMH” (SEQ ID NO: 29) and a CDR-H2 having the amino acid sequence “FIRNKANGGTTEYAASVKG” (SEQ ID NO: 28) and a CDR-H3 having the amino acid sequence “DRGLRFYFDY” (SEQ ID NO: 27) or (ii) a CDR-H1 having the amino acid sequence “TYAMH” (SEQ ID NO: 31) and a CDR-H2 having the amino acid sequence “LISNDGSNKYYADSVKG” (SEQ ID NO: 30) and a CDR-H3 having the amino acid sequence “DRGLRFYFDY” (SEQ ID NO: 27). Furthermore, processes for the production of said pharmaceutical compositions as well as medical/pharmaceutical uses for the IgG1 antibody molecules bearing specificities for the human CEA antigen are disclosed.

Abstract: The present invention relates to pharmaceutical compositions for the treatment of an epithelial tumor in a human, said pharmaceutical composition comprising a bispecific single chain antibody which has a first binding domain specifically binding to human CD3, and a second binding domain specifically binding to human CEA, wherein said second binding domain comprises at least a part of the CDR-H3 or the complete CDR-H3 of murine monoclonal antibody A5B7. Furthermore, processes for the production of said pharmaceutical compositions as well as medical/pharmaceutical uses for the specific bispecific single chain antibody molecules bearing specificities for the human CD3 antigen and the human CEA antigen are disclosed.