Cox-2 expression in retinoblastoma.

Karim, M M; Hayashi, Y; Inoue, M; Imai, Y; Ito, H; Yamamoto, M · Am J Ophthalmol · 2000

case_series · Level IV

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Abstract

Cox-2, a prostaglandin synthase, is overexpressed in colorectal cancers and is involved in angiogenesis as well as in tumorigenesis. In this study, we investigate the expression of Cox-2 in retinoblastoma. Twenty-nine formalin-fixed retinoblastoma specimens were examined by the labeled-streptavidin-biotin method using anti-Cox-2 antibody. Cox-2 positive immunoreactions were observed in 28 (96%) of 29 retinoblastomas specimens. This preliminary study suggests the overexpression of Cox-2 in both differentiated and undifferentiated retinoblastoma and its possible role in tumorigenesis.

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