進行性前立腺癌に対する血中オステオカルシンの臨床的意義
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概要
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1)前立腺癌患者で多発性骨転移を有するA群15例,2)前立腺癌で転移のないB群12名,3)対照としての前立腺肥大症C群51例,平均年齢は72.1歳,71.7歳,70.4歳であった.血中オステオカルシン(OC)(正常値2.5～8.5 ng/ml)は10.8, 5.7, 5.8 ng/mlでAB間は有意差(p≦0.05),AC間も同様であったが,転移を有する前立腺癌は治療後OC値の下降傾向を示したThe clinical significance of osteocalcin as a marker for advanced prostate cancer was examined. Osteocalcin is produced by osteoblasts and is also detected in the blood. Its change is a good index of osteometabolic diseases and especially of the osteoblastic activity. In the present study, we examined the serum osteocalcin concentration of those patients with urogenital tumor, especially prostate cancer, who had been confirmed for multiple bone-metastasis by clinical examination. These patients comprised an untreated group (15 cases) of patients with prostate cancer presenting confirmed bone-metastasis, and a group of patients without bone-metastasis. The respective serum osteocalcin concentrations of these two groups were compared with 51 cases of prostate hypertrophy used as the control group. The findings revealed that the serum osteocalcin concentration demonstrated high values in the first group with a tendency toward lowering during treatment. Neither the latter group nor the control group showed high values. On the other hand, false-positive cases (8%), and false-negative cases (20%) were found. In the case of bone-metastasis, these results suggest that measurement of serum osteocalcin concentration is useful for clinical periodical observation about the activity of the bone metastatic focus.
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