PMC10035523_01
Map of the human Ig heavy chain locus in germline configuration. The box demonstrates the large deletion found in the described patient.
10.1177_27534030231156206-fig1.jpg
PMC10035523_01_10.1177_27534030231156206-fig1.jpg
fig1-27534030231156206
The diagnosis was preceded by a concern for primary immunodeficiency and lab studies revealing low serum levels of IgG1, IgG2, and IgG4 (Figure 1).