- The CD34 epitope is expressed in neoplastic and malformative lesions associated with chronic, focal epilepsies. Blümcke, I., Giencke, K., Wardelmann, E., Beyenburg, S., Kral, T., Sarioglu, N., Pietsch, T., Wolf, H.K., Schramm, J., Elger, C.E., Wiestler, O.D. Acta Neuropathol. (1999)