<prompt> A two month baby presents with epiphora and regurgitation. The most likely diagnosis is:Mucopurulent conjunctivitisBuphthalmosCongenital dacryocystitisEncysted mucocele  <response>: Congenital dacyrocystitis is mainly due to membranous occlusion at the lower end near the valve of Hasner. Clinical features include Epiphora, positive regurgitation test and swelling of the sac. Ref: A.K KHURANA 2005, Chapter 15, Disease of The Lacrimal Apparatus, In the book, Opthalmology, 3rd Edition, Newdelhi, Page 342 