title: [Serum concentration of pyridinoline cross-linked carboxy-terminal telopeptide of type-I collagen (ICTP) and carboxyterminal propeptide of human type I procollagen (PICP) in the diagnosis of bone metastases].
abstract: Recently discovered bone metabolic markers are expected to play an additional role in the diagnosis of bone metastasis. We measured bone metabolic markers, serum pyridinoline cross-linked carboxy-terminal telopeptide of type I collagen (ICTP) and carboxyterminal propeptide of human type I procollagen (PICP) in 224 patients with breast cancer (106 with bone metastases), 61 patients with prostatic cancer (30 with bone metastases), 45 patients with lung cancer (17 with bone metastases) and 13 patients with miscellaneous cancers (7 with bone metastasis) and compared the values in the presence and absence of bone metastasis. ICTP and PICP increased significantly in patients with bone metastases. By the analysis of sensitivity and specificity, the cut-off levels were considered to be 5.0 ng/ml for ICTP and 140 ng/ml for PICP. In lung cancer (bone metastases are mostly of osteolytic), ICTP was excellent marker in detecting bone metastasis. In breast cancer (bone metastases are mostly of mixed type), ICTP was good in detecting bone metastases. In prostatic cancer (bone metastases are mostly of osteoblastic), ICTP and PICP were good markers in detecting high grade of bone metastases. Over all, ICTP was more sensitive in the diagnosis of bone metastases than PICP. However, both markers were not effective in detecting low grade bone metastases. ICTP and PICP should play a supportive role to imaging modalities in the diagnosis of bone metastases.
authors.affiliation: Department of Nuclear Medicine, Cancer Institute Hospital, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Koizumi
authors.forename: Y
authors.initials: Y
authors.lastname: Yamada
authors.forename: T
authors.initials: T
authors.lastname: Takiguchi
authors.forename: C
authors.initials: C
authors.lastname: Suzuki
authors.forename: T
authors.initials: T
authors.lastname: Akashi
authors.forename: E
authors.initials: E
authors.lastname: Nomura
authors.forename: T
authors.initials: T
authors.lastname: Yamashita
authors.forename: E
authors.initials: E
authors.lastname: Ogata
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000097:blood*; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000556:secondary*; D003094:Collagen / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D010446:Peptide Fragments / Q000097:blood*; D011347:Procollagen / Q000097:blood*; D012680:Sensitivity and Specificity
chemical_list: D014408:Biomarkers, Tumor; D010446:Peptide Fragments; D011347:Procollagen; C042813:procollagen type I carboxy terminal peptide; D003094:Collagen