Cytokeratin expression in plasmablastic lymphoma - a possible diagnostic pitfall in the routine work-up of tumours.
Katrin S HuettlAnnette M StaigerHeike HornFabian FrontzekJohn R GoodladGustavo TapiaAndreas RosenwaldWolfram KlapperFalko FendFina ClimentJosep CastellviAlexandar TzankovStefan DirnhoferMaria João BaptistaJosé-Tomas NavarroIoannis AnagnostopoulosWolfgang HartmannGeorg LenzGerman OttPublished in: Histopathology (2020)
Our data indicate CK expression in a substantial number (15%) of PBLs. In view of the particular morphological features of PBL and its frequent negativity for the common leukocyte antigen and B-cell markers, this feature represents a pitfall in the routine diagnostic work-up of PBL, and requires more extensive immunohistochemical and molecular characterisation of cases entering the differential diagnosis.