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Pakistan Journal of Biological Sciences

Year: 2010 | Volume: 13 | Issue: 4 | Page No.: 175-179
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Authors

M. Mohammadzadeh

H. Alikhah

A.G.A. Zareh

Keywords

Research Article

Comparison of Bone Scan with Carbohydrate Antigen 15-3 for Evaluation of Bone Metastasis of Brest Cancer

M. Mohammadzadeh, H. Alikhah and A.G.A. Zareh
This study aimed at comparing the bone scan and CA15-3 titer in patients with breast cancer for evaluation of bone metastasis. Thirty five patients with definite diagnosis of breast cancer were evaluated in Tabriz Imam Khomeini Hospital from 2007 to 2008. Bone scan (99 mTc-MDP) performed in all patients. The serum CA15-3 was measured by ECLIA method. The increased level was considered as >30 U mL-1. The serum level of CA15-3 was compared between the patients with and without bone metastasis, as well as its correlation with the extent of bone involvement. Thirty five patients with the mean age of 51.69±10.77 (34-81) years were enrolled in the study. According to bone scan results, 24 (68.8%) patients revealed bone metastasis. The mean level of serum CA15-3 was significantly higher in patents with bone metastasis than patients without metastasis (26.37±4.74 U mL-1 vs. 19.09±1.99 U mL-1; p<0.001). There was not significant relation between the serum level of CA15-3 and the extent of bone metastasis (rho = -0.063, p = 0.769). Coordinates of the curve study yielded a cut-off point > 21.8 U mL-1 for the serum level of CA15-3 in our patients, with a sensitivity and specificity of 91.7 and 91%, respectively. Serum level of CA15-3 is higher in the patients with bone metastatic breast cancer; however, the recommended cut-off point might not be suitable for Iranian patients. Further studies with large sample sizes are recommended.
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