Adenoid cystic carcinomas of the breast have low Topo IIa expression but frequently overexpress EGFR protein without EGFR gene amplification.

Vranic S, Frkovic-Grazio S, Lamovec J, Serdarevic F, Gurjeva O, Palazzo J, Bilalovic N, Lee LM, Gatalica Z. Adenoid cystic carcinomas of the breast have low Topo IIa expression but frequently overexpress EGFR protein without EGFR gene amplification. Hum Pathol. 2010 Nov; 41(11):1617-23.

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