This exhibit will illustrate the imaging characteristics of the entire spectrum of benign liver masses. It will focus not on how to characterize the commonest tumors, but on how to approach the incidentally discovered mass, multiple masses and different appearing masses. The aim is to educate the viewer to reduce unnecesary imaging and biopsies.

approach to single & multiple incidental liver masses. tumors of hepatocellular origin: adenoma, NRH, FNH. tumors of cholangiocellular origin: biliary & choledochal cysts,cystadenoma, bile duct hamartoma. tumors of mesenchymal origin: hemangioma, peliosis, fat-containing tumors etc. Mixed tumors: teratoma, hamartoma. pitfalls: ectopias, infections, inflammations, pseudotumors, vascular anomalies, infarcts, trauma, post-procedures & surgery malignant tumors masquarading as benign entities

This exhibit, presented as a workshop at the DDW, illustrates the spectrum of benign etiologies of liver masses. The imaging features of tumors derived from hepatocellular, cholangiocellular and mesenchymal cells are shown, and contrasts these with a wide range of pseudotumors resulting from vascular, infectious, inflammatory, traumatic and iatrogenic causes. The viewer is taught how to approach the incidental liver lesion(s), what next-step imaging is most appropriate, and how to avoid biopsy.