The present invention relates to the field of prognosis and/or diagnosis of a proliferative disease in a patient. More particularly, the invention relates to an antibody capable of binding specifically to the human cMet receptor, as well as the amino acid and nucleic acid sequences coding for this antibody. The invention likewise comprises the use of said antibody, and corresponding processes, for detecting and diagnosing pathological hyperproliferative oncogenic disorders associated with expression of cMet. In certain embodiments, the disorders are oncogenic disorders associated with increased expression of cMet polypeptide relative to normal or any other pathology connected with the overexpression of cMet. The invention finally comprises products and/or compositions or kits comprising at least such antibody for the prognosis or diagnostic of certain cancers.
