Urine calcium and deoxypyridinoline in assessment of response to local radiation therapy for metastatic bone disease.
Year: 2007
Type: article
Abstract: To evaluate the predictability of urine calcium (Ca+2) and deoxypyridinoline (DPD) in the assessment of response to palliative radiation therapy (RT) for metastatic bone disease. Forty-two patients with osteolytic bone metastases from breast or lung primaries were enrolled in this study. Serial urine Ca+2 and DPD measurements were performed before RT, six weeks, and twelve weeks afterwards. All eligible patients received a total of 30 Gy RT in 3 Gy daily fractions. Pre-irradiation mean urine Ca+2 and DPD levels were 16 +/- 3.7 g/micromol/dL, and 89.2 +/- 61 pmol/micromol crea. Both were significantly higher than normal range. A significant correlation between pre-irradiation Ca+2 (r = 0.6, p < 0.001), DPD (r = 0.8, p < 0.001) levels and the extent of bone metastases were detected. Thirty-six patients (Group I) were alive without disease progression outside the radiation portal. Urine Ca+2 and DPD levels demonstrated a significant and progressive decrease following RT in Group I patients (p < 0.001). Clinical and radiological evaluation revealed occurrence of new bone metastases in six patients (Group II), with concurrent significant increase in concentrations of urine DPD and Ca+2 (p = 0.006 for Ca+2 and p = 0.009 for DPD, respectively). Urine Ca+2 and DPD levels can be used for assessment of response of bone to local irradiation, and are able to predict further progression of bone metastases in cancer patients.
Source: PubMed
Authors: E Topkan, A Karaoglu
Institutions: Inonu University, Turgut Özal Tıp Merkezi
Language: English
Subfield: Surgery
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2462573746