STAT3 and diffuse large B-cell lymphoma: As context for the eosinophil results, the qPCR analyses were extended to cell lines derived from two subtypes of DLBCL (diffuse large B cell lymphoma): activated B cell-like (ABC) DLBCL, which requires activated STAT3 for growth and in which STAT3 is known to be highly-expressed, and germinal center B cell-like (GCB) DLBCL in which STAT3 expression is much lower [17].