title: Dacryocystography and lacrimal probing in cases of congenital obstruction of nasolacrimal duct.
mesh_terms: D006801:Humans; D007765:Lacrimal Apparatus / Q000000981:diagnostic imaging*; D007767:Lacrimal Duct Obstruction / Q000151:congenital* / Q000175:diagnosis / Q000000981:diagnostic imaging; D011859:Radiography