Quality assessment for immunophenotyping of leukaemias and lymphomas: the Dutch experience. The SIHON Study Group

Sending material at regular intervals to laboratories that perform immunophenotyping of leukaemias and lymphomas showed a large variety in the percentage of positive cells between the different laboratories but an agreement in diagnosis of more than 90%. Each laboratory used his own methods but antibody panels and guide-lines for interpretation were standardised. Studies are in progress to answer the question if standardisation in flow cytometry will result in more comparable results.