NOVEL DISEASE MARKER AND DIAGNOSIS USING THE SAME

Disclosed is a test method for diagnosing pancreatic cancer, breast cancer, uterine corpus cancer, ovarian cancer, cervical cancer, prostate cancer, uterine fibroid, endometriosis or Crow-Fukase syndrome in a subject, which is characterized by determining the quantity of a peptide comprising the amino acid sequence depicted in SEQ ID NO:1 (preferably by mass spectrometry or by using an antibody recognizing specifically the peptide) in a biological sample (preferably a body fluid, more preferably a serum, a plasma or the like) collected from the subject.