<unk>  (BLS<unk>  is a rare recessive genetic condition in which a group of genes called major histocompatibility complex class<unk>  (MHC class<unk>  are not expressed. The result is that the immune system is severely compromised and cannot effectively fight infection.
Bare lymphocyte syndrome type II
Kasabach–Merritt syndrome
Pitt–Hopkins syndrome
Hypotrichosis–lymphedema–telangiectasia syndrome
Schwartz–Jampel syndrome
EAST syndrome
Rapp–Hodgkin syndrome
Hagemoser–Weinstein–Bresnick syndrome