Phosphoribosylaminoimidazole Carboxylase Deficiency, also known as paicsd, is related to adenylosuccinase deficiency and aica-ribosuria due to atic deficiency. An important gene associated with Phosphoribosylaminoimidazole Carboxylase Deficiency is PAICS (Phosphoribosylaminoimidazole Carboxylase And Phosphoribosylaminoimidazolesuccinocarboxamide Synthase). Affiliated tissues include lung, and related phenotypes are short neck and depressed nasal bridge