MHC class II deficiency https://github.com/monarch-initiative/mondo/issues/4521 https://github.com/monarch-initiative/mondo/issues/9285 https://rarediseases.info.nih.gov/diseases/824/bare-lymphocyte-syndrome-2 https://www.malacards.org/card/mhc_class_ii_deficiency https://www.malacards.org/card/mhc_class_ii_deficiency_1 SCID, HLA Class II-negative MONDO:0008855 MHC class II expression deficiency DOID:5812 BLS type II NCIT:C176823 BLS, type II BARE lymphocyte syndrome, type II, complementation group C, included icd11.foundation:2021339495 NANDO:2200702 BARE lymphocyte syndrome immunodeficiency by defective expression of HLA class type 2 Orphanet:572 BARE lymphocyte syndrome, type II, complementation group B, included Immunodeficiency by defective expression of HLA class 2 is a rare primary genetic immunodeficiency disorder characterized by partial or complete absence of human leukocyte antigen class 2 expression resulting in severe defect in both cellular and humoral immune response to antigens. The disorder presents clinically as marked susceptibility to infections, severe malabsorption and failure to thrive and is often fatal in early childhood. UMLS:C5447452 NANDO:1200329 severe combined immunodeficiency, HLA class ii-negative MEDGEN:1781237 major histocompatibility complex class II expression deficiency BARE lymphocyte syndrome, type II, complementation group E, included BLS 2 HLA class 2-negative SCID Bare lymphocyte syndrome type 2 NCIT:C3895 SCID, HLA Class 2-negative OMIMPS:209920 BLSII Bare lymphocyte syndrome, type II BARE lymphocyte syndrome, type II, complementation group D, included Bare lymphocyte syndrome 2 GARD:0000824 BLS HLA class 2-negative severe combined immunodeficiency SCID, HLA CLASS II-NEGATIVE BARE lymphocyte syndrome, type II, complementation group A, included MESH:C537079 SCTID:71904008 familial severe combined immunodeficiency