dacryostenosis

What Is Congenital Dacryocystocele? Introduction. Congenital dacryocystocele is an uncommon consequence of congenital nasolacrimal duct obstruction: it is believed to occur as a result of a concomitant upper obstruction of the Rosenmuller valve and lower obstruction of the Hasner valve 1 – 3. What is congenital Dacryostenosis? As many as 6 percent of newborns have