5 Antibodies for medical diagnostic use, for the purpose of expansion, selection, quality control and implantation of human, in vivo, cartilage forming cells including stem cell preparations of stem cell implants; pharmaceutical, veterinary or medical preparations for expansion, selection, quality control and implantation of human, in vivo, cartilage forming cells; nutritious media and growth substrates for expansion, selection, quality control and implantation of human, in vivo, cartilage forming cells including stem cell preparations or stem cell implants; medical preparations, namely, polymer preparations and cell matrices of any type of origin for expansion, selection, medical quality control and implantation of human, in vivo, cartilage forming cells including stem cell preparations or stem cell implants; test products for medical use, for the purpose of the control of expansion, selection, and implantation of human, in vivo, cartilage forming cells including stem cell preparations or stem cell implants, namely, chondrocytes, chondrocyte progenitors, chondrocyte precursors and stem cells with chondrogenic properties; hormones for the promoting of the growth of cells called growth factors for medical use; veterinary or medical kits for expansion, selection, quality control and implantation of human, in vivo, cartilage forming cells including stem cell preparations or stem cell implants, namely, kits primarily composed of growth and differentiating promoting polypeptides; quality control kits consisting primarily of monoclonal antibodies for use in disease testing and ligands or oligonucleotide primers and DNA chips for medical or veterinary use; quality control kits consisting primarily of antibodies or oligonucleotide primers and DNA chips for selection and quality control of human, in vivo, cartilage forming cells including stem cell preparations and stem cell implants for medical/diagnostic use; implementation kits consisting primarily of live cartilage forming cells