title: [Detection of bone metastasis by serial measurement of C-terminal telopeptide of type I collagen in patients with malignancy].
abstract: Measurements of biochemical markers specific to bone resorption are known to be useful in evaluation of skeletal metastasis. However, most of previous studies were performed cross-sectionally and sensitivity for detection of early bone metastasis was not satisfactory. Since basal levels of bone markers differ significantly individually, longitudinal studies would be preferable to evaluate small metabolic changes such as in early skeletal metastasis. Thus, we performed serial measurements of serum c-terminal telopeptide of type I collagen (ICTP), a bone resorption marker, in patients with malignancy and evaluated its clinical significances for detection of bone metastasis, comparing with measurements of propeptide of type I procollagen (PICP) and tumor markers. In total, 43 patients (41 of them are breast cancer), serial serum samples were obtained during 0.5 to 2.4 years (mean 1.4 years). In all of nine patients, who developed bone metastasis, serum ICTP level increased, and by successful treatment to the metastatic lesions, ICTP level decreased, while in some cases, tumor markers remained to be elevated. PICP was less sensitive and specific for detection of bone metastasis. Thus, serial measurement of ICTP is suggested to be useful for detection and evaluation of therapeutic responses in patients with bone metastasis.
authors.affiliation: Department of Radiology, Shiga University of Medical Science, Japan.
authors.forename: I
authors.initials: I
authors.lastname: Yamamoto
authors.forename: H
authors.initials: H
authors.lastname: Miura
authors.forename: Y
authors.initials: Y
authors.lastname: Kigami
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamura
authors.forename: T
authors.initials: T
authors.lastname: Ohta
authors.forename: I
authors.initials: I
authors.lastname: Yuu
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: R
authors.initials: R
authors.lastname: Morita
mesh_terms: D014408:Biomarkers, Tumor / Q000097:blood*; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000556:secondary*; D001943:Breast Neoplasms / Q000473:pathology; D003094:Collagen / Q000097:blood*; D024042:Collagen Type I; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology; D008991:Monitoring, Physiologic; D010455:Peptides / Q000097:blood*
chemical_list: D014408:Biomarkers, Tumor; D024042:Collagen Type I; D010455:Peptides; C052929:collagen type I trimeric cross-linked peptide; D003094:Collagen