title: Nuclear lacrimal scan vs dacryocystography.
abstract: The lacrimal drainage systems of 78 eyes were studied by technetium scanning at the University of Iowa and, of these, 25 were also subjected to conventional contrast dacryocystography. Twenty-six eyes were asymptomatic for epiphora and normal scans were recorded on all of them. All of the remaining 52 symptomatic eyes had an abnormal lacrimal scan with either a presac or a postsac blockage. In general, there was good correlation with dacryocystography, with the exception of three cases of functional block which had a normal dacryocystogram. Technetium scanning should serve as a valuable tool for diagnosing and localizing lacrimal obstruction.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003608:Dacryocystorhinostomy; D005260:Female; D005452:Fluoresceins; D006801:Humans; D007765:Lacrimal Apparatus / Q000000981:diagnostic imaging*; D007767:Lacrimal Duct Obstruction / Q000175:diagnosis*; D008297:Male; D011859:Radiography; D011877:Radionuclide Imaging / Q000295:instrumentation*; D013666:Tears; D013667:Technetium
chemical_list: D005452:Fluoresceins; D013667:Technetium