T-Cell Lymphopenia, Infantile, with or Without Nail Dystrophy, Autosomal Dominant, is also known as tlind. An important gene associated with T-Cell Lymphopenia, Infantile, with or Without Nail Dystrophy, Autosomal Dominant is FOXN1 (Forkhead Box N1). Affiliated tissues include t cells and bone marrow, and related phenotypes are abnormally low t cell receptor excision circle level and t lymphocytopenia