Abnormal B cell morphology Abnormal B cell count Abnormal numbers of B cells Abnormality of B cell numbers Abnormality of B cell count UMLS:C4021208 Abnormal number of B cells 2011-02-06T09:38:18Z Abnormal increase or decrease of total B cells or any deviation of the propoortion of a B cell subtype. B cells are commonly characterized as CD19+ or CD20+ lymphocytes, or their subpopulations, in the blood, compared to a reference range for a given sex and age-group, measured ex vivo. HP:0010975 Abnormal lymphocyte count number of anatomical enitites of type B cell phenotype