<unk> , or congenital pulmonary venolobar syndrome, is a rare congenital heart defect characterized by anomalous venous return from the right lung (to the systemic venous drainage, rather than directly to the left atrium). This anomalous pulmonary venous return can be either partial (PAPVR) or total (TAPVR). The syndrome associated with PAPVR is more commonly known as<unk>  after the curvilinear pattern created on a chest radiograph by the pulmonary veins that drain to the inferior vena cava. This radiographic density often has the shape of a<unk> , a type of curved sword. The syndrome was first described by Catherine Neill in 1960.
Scimitar syndrome
Elejalde syndrome
Shell nail syndrome
Larsen syndrome
Jeavons syndrome
Bowen–Conradi syndrome
Saal Bulas syndrome
Burnside–Butler syndrome