<unk>  <unk>  is a rare medical syndrome in which the body has too few<unk> + T lymphocytes, which are a kind of white blood cell.<unk>  is sometimes characterized as "HIV-negative AIDS", though, in fact, its clinical presentation differs somewhat from that seen with HIV/AIDS. People with<unk>  have a weakened immune system and are susceptible to opportunistic infections, although the rate of infections is lower than in people with AIDS.
Idiopathic CD4+ lymphocytopenia
Persistent polyclonal B-cell lymphocytosis
Monoclonal B-cell lymphocytosis
X-linked lymphoproliferative disease
Thymic hypoplasia
Dermatopathic lymphadenopathy
Adult-onset immunodeficiency syndrome
CD25 deficiency