EFO_0920042 (immune deficient-predominant bronchiectasis) is a bronchiectasis endotype characterized by underlying immune deficiency, presenting with impaired systemic immunity and increased susceptibility to mycobacterial infection, particularly nontuberculous mycobacteria. This endotype encompasses a spectrum of primary and acquired immunodeficiencies that predispose to chronic airway infection and bronchiectatic disease. Also known as: immunodeficiency-associated bronchiectasis.