Diagnostic Accuracy of Gray Scale Sonography for the Detection of Malignant Breast Tumour

S. Ara, A. Sattar, Syed Md. Sazzad Kamal, Md. Durrul Huda, Md Abdullah Yusuf, M. Islam
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Abstract

Background: Gray scale sonography is an important diagnostic tool for the detection of malignant breast tumour. Objective: The purpose of the present study was to find out the diagnostic validity gray scale sonography to detect malignant lesions of breast. Methodology: This cross-sectional study was carried out in the department of Radiology and Imaging, in collaboration with the department of Surgery and Pathology at Banghabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, from July 2008 to June 2009 for a period of one year. Women presented with clinically suspected breast mass from outpatients’ department (OPD) or inpatient department (IPD) were purposively selected and was Ultrasonographic diagnosis. 2-D Real-Time B-Mode Ultrasonographic examinations were done using high frequency (7.5 MHz) linear transducer. Result: Test of validity was done for color Doppler Sonographic findings in evaluation of benign and malignant breast lesion. Out of 50 cases, 23 cases were true positive; 4 cases were false negative; 1 case was false positive; 22 cases were true negative confirmed by histopathology. Here sensitivity and specificity of Gray scale ultrasonography were 85.18% and 95.0% respectively. Here accuracy of Gray scale study was 90.0%. Positive predictive value was 95.83% and negative predictive value was 84.61%. Conclusion: Gray scale ultrasonography is a useful method in the differentiation between benign and malignant breast masses.
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灰度超声对乳腺恶性肿瘤的诊断准确性
背景:灰阶超声是检测乳腺恶性肿瘤的重要诊断工具。目的:探讨灰阶超声对乳腺恶性病变的诊断价值。方法:这项横断面研究于2008年7月至2009年6月在达卡Banghabandhu Sheikh Mujib医科大学放射和成像系与外科和病理学系合作进行,为期一年。有目的地选择门诊部(OPD)或住院部(IPD)出现临床疑似乳腺肿块的女性,并进行超声诊断。使用高频(7.5MHz)线性换能器进行二维实时B型超声检查。结果:彩色多普勒超声检查结果对乳腺良恶性病变的评价具有有效性。在50例病例中,23例为真阳性;假阴性4例;假阳性1例;22例经组织病理学证实为真阴性。灰阶超声的敏感性和特异性分别为85.18%和95.0%。灰阶超声检查的准确性为90.0%,阳性预测值为95.83%,阴性预测值为84.61%。结论:灰阶超声是鉴别乳腺良恶性肿块的有效方法。
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