Comparative Immunohistochemical Analysis of IMP3, GLUT1, EMA, CD146, and Desmin for Distinguishing Malignant Mesothelioma From Reactive Mesothelial Cells

Hiroshi Minato; Nozomu Kurose; Mana Fukushima; Takayuki Nojima; Katsuo Usuda; Motoyasu Sagawa; Tsutomu Sakuma; Akishi Ooi; Isao Matsumoto; Makoto Oda; Yoshihiko Arano; Junzo Shimizu
January 2014
American Journal of Clinical Pathology;Jan2014, Vol. 141 Issue 1, p85
Academic Journal
Objectives: To identify useful biomarkers for differentiating between malignant mesothelioma (MM) and reactive mesothelial cells (RMCs). Methods: Formalin-fixed, paraffin-embedded (FFPE) tissues from 34 MM and 40 RMC samples were analyzed using immunohistochemistry, and the findings were compared. Results: Positive markers for MM included insulin-like growth factor 2 messenger RNA binding protein 3 (IMP3), glucose transporter 1 (GLUT1), epithelial membrane antigen (EMA), and CD146, which showed sensitivities of 94%, 85%, 79%, and 71% and specificities of 78%, 100%, 88%, and 98%, respectively. In sarcomatoid MM, EMA had significantly lower expression than did IMP3, GLUT1, and CD146 (P < .001). The areas under receiver operating characteristic curves were the highest for IMP3 (0.95), followed by GLUT1 (0.93). When the optimal cutoff points for IMP3 (30%) and GLUT1 (10%) were used, the sensitivity of IMP3 and GLUT1 for MM was 100%, and the specificity of both for MM was 95%. Conclusions: The combination of IMP3 and GLUT1 is most appropriate for distinguishing MM from RMC using FFPE sections.


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