absent pre-B cells Absence of pre-B cell Loss of pre-B cell MP:0000238 MP:0000349 MPheno.ontology absence of pre-B cell absence of the cells in the B lymphocyte lineage that have undergone VDJ rearrangement of the immunoglobulin heavy chain and are in the process of V-J rearrangement of the light chain: these cells express mu heavy chain on the cell surface deficiency of pre-B cells loss of pre-B cell decreased pre-B cell number absent immature B cells