title: Abdominal halo in Tc-99M DISIDA hepatobiliary scintigraphy: a sign of massive ascites.
abstract: An abdominal halo was demonstrated in a Tc-99m di-isopropyl imminodiacetic acid (DISIDA) hepatobiliary scintigram of a patient with a long history of alcohol abuse and liver disease complicated by massive ascites. This halo was not observed in the concurrent Tc-99m sulfur colloid study. Large amounts of ascitic fluid floated the liver, the bowel and the mesentery in the central abdomen forming an abdominal halo, a band-like clear zone around the abdominal organs. Severe hepatic dysfunction, resulting in prolongation of the blood pool phase in the Tc-99m DISIDA study, will cause exaggeration of this finding. When an abdominal halo is seen it should be considered a sign of massive ascites.
mesh_terms: D000005:Abdomen / Q000000981:diagnostic imaging*; D001201:Ascites / Q000175:diagnosis* / Q000000981:diagnostic imaging; D001659:Biliary Tract / Q000000981:diagnostic imaging*; D006801:Humans; D007098:Imino Acids; D008099:Liver / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D013667:Technetium; D019785:Technetium Tc 99m Disofenin; D014055:Tomography, Emission-Computed
chemical_list: D007098:Imino Acids; D013667:Technetium; D019785:Technetium Tc 99m Disofenin