decreased T cell number abnormal NK T cell number decreased NK T cell number MP:0008040 MPheno.ontology decreased NK T lymphocyte number decreased NK T-cell number decreased NK T-lymphocyte number decreased NKT cell number decreased natural T cell number decreased natural killer T cell number decreased natural killer T lymphocyte number decreased natural killer T-cell number decreased natural killer T-lymphocyte number reduced NK T cell number reduced NK T lymphocyte number reduced NK T-cell number reduced NK T-lymphocyte number reduced NKT cell number reduced natural T cell number reduced natural killer T cell number reduced natural killer T lymphocyte number reduced natural killer T-cell number reduced natural killer T-lymphocyte number reduced number of the distinct lineage of T cells expressing natural killer cell markers and having T cell receptors characterized by the usage of a restricted repertoire of variable region gene segments