CD79A and Osteolysis: The following tests were negative: Aspergillus IgE (quantitation), human leukocyte antigen (HLA)-B27, IgA antibody to endomysium, liver/kidney microsomal antibodies (LKM), rheumatoid factor (latex screen), reticulin (R1) antibodies, IgA antibodies to tissue transglutaminase, and a connective tissue disease screen. These results effectively ruled out conditions commonly associated with osteolysis.