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Japanese Journal of Clinical Oncology 34:149-154 (2004)
© 2004 Foundation for Promotion of Cancer Research

CA125 Expression in Epithelioid Sarcoma

Hiroshi Kato1, Masahito Hatori1, Shoichi Kokubun1, Mika Watanabe2, Richard A Smith3, Tetsuo Hotta4, Akira Ogose4, Tetsuro Morita5, Takashi Murakami6 and Setsuya Aiba7,+

1 Department of Orthopedic Surgery, 2 Department of Pathology and 7 Department of Dermatology, Tohoku University School of Medicine, Sendai, Japan, 3 University of Tennessee-Campbell Clinic, Memphis, Tennessee, USA, 4 Department of Orthopedic Surgery, Niigata University School of Medicine, Niigata, 5 Department of Orthopedic Surgery, Niigata Prefectural Cancer Center, Niigata and 6 Department of Orthopedic Surgery, Miyagi Prefectural Cancer Center, Natori, Miyagi, Japan

Objective: There has been no report on useful immunohistological markers for epithelioid sarcoma (ES) so far. The purpose of this study is to evaluate the positivity and specificity of CA125 as a marker for the correct diagnosis of ES.

Methods: This study was performed in 11 patients with ES (nine men and two women; distal type: 10 cases; proximal type: one case), 78 patients with other soft tissue tumors and nine with benign granulomas. The other soft tissue tumors consisted of six synovial sarcomas, six clear cell sarcomas, eight leiomyosarcomas, six rhabdomyosarcomas, five malignant peripheral nerve sheath tumors, ten malignant fibrous histiocytomas, 17 desmoid tumors, 14 liposarcomas, six squamous cell carcinomas (cutaneous SCC of the distal extremities), two rheumatoid nodules and seven foreign body granulomas. Immunohistochemical analysis for CA125 was performed for these 89 soft tissue tumors and nine granulomas using a labeled streptavidin biotin method. Immunohistochemical analysis of epithelial membrane antigen, cytokeratin, carcinoembrionic antigen, vimentin and CD34 was performed only for the 11 ES patients.

Results: CA125 was strongly expressed in 10 out of the 11 ES patients. EMA, cytokeratin and vimentin were also positive in all the cases. CEA was positive in two of the 11 patients. Immunohistochemical study in six ES patients showed expression of CD 34. The other 78 soft tissue tumors and nine granulomas did not express CA125.

Conclusion: This study clearly revealed the specificity and positivity of CA125 in ES. These data indicate that CA125 may be a useful tumor marker for diagnosing ES.

+ For reprints and all correspondence: Masahito Hatori, M.D., Department of Orthopedic Surgery, Tohoku University School of Medicine, 1–1 Seiryomachi, Aobaku, Sendai 980-8574, Japan. E-mail: mhato{at}mail.tains.tohoku.ac.jp


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