Plasma cells in bone marrow.
D000367:Age Factors; D001853:Bone Marrow; D001854:Bone Marrow Cells; D001856:Bone Marrow Examination; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007109:Immunity; D007153:Immunologic Deficiency Syndromes / Q000175:diagnosis; D007223:Infant; D010950:Plasma Cells