Because not all patients with SIADH have increased serum levels of AVP, the term was inaccurate for this condition and syndrome of inappropriate antidiuresis (SIAD) was proposed as an accurate term.[11] Various etiologies can cause SIADH, and they can be categorized as related to malignant diseases, pulmonary diseases, infection, and disorders of the central nervous system. This evidence concerns the gene AVP and lung disorder.