Abstract
We compared the two methods of assessing CD30 protein expression in DLBCL and TCL specimens routinely employed at our hospital, immunohistochemistry (IHC) and flow cytometry (FCM), using the same clone of the anti-CD30 antibody (Ber-H2) in 123 patients with DLBCL and 28 patients with TCL. FCM was more sensitive than IHC, especially in cases with low expression. In three cases of TCL and two cases of DLBCL, there was discordance between these two methods. Two of these TCL cases were ALCL and one was peripheral T-cell lymphoma, NOS, but ALCL was unable to be excluded. One of two cases of DLBCL was an anaplastic variant of DLBCL. The data suggested that CD30 was undetectable, though rare, by FMC in several cases. Based on this study, a combination of IHC and FCM is recommended for the reliable and quantitative detection of CD30.
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