Opportunistic viral (disseminated human papillomavirus [HPV] and HPV-associated squamous cell carcinoma) 51, parasitic and fungal infections, as well as pulmonary alveolar proteinosis (GATA2 is known to influence the phagocytic activity of pulmonary alveolar macrophages) can be seen 52. The gene discussed is GATA2; the disease is squamous cell carcinoma.