Abstract:Activated phosphoinositide 3-kinase delta syndrome (APDS) is a rare autosomal dominant primary immunodeficiency disease (PID). To date, more than 300 cases have been reported globally. The c.3061 G > A (p. E1021K) and c.1425+1 G > (A, C, T) (p.434-475del) mutations are a research focus currently. Early screening with next-generation sequencing (NGS) can shorten the time to confirmed diagnosis of APDS. However, owing to the low incidence of APDS and the high heterogeneity of clinical features, the recognition of the disease is insufficient; misdiagnosis and missed diagnosis of the disease are commonly seen; and there is no standard diagnosis and treatment framework at present. This paper reviews the advances on pathogenesis, diagnosis and treatment of APDS in recent years.