Obstruction of nasolacrimal drainage apparatus

Dr Amir Rezaee et al.

Obstruction of nasolacrimal drainage apparatus results in epiphora and can be primary or secondary, congenital or acquired. Obstruction can occur in canaliculi, lacrimal sac, or nasolacrimal duct (post saccular) levels.

Congenital obstruction is usually secondary to persistence of the membrane at the valve of Hasner, which results in complete nasolacrimal duct obstruction and dacryocystitis.

Acquired obstruction can be primary (PANDO) or secondary due to a wide range of detectable causes such as trauma and facial fractures, surgery, inflammatory diseases such as sarcoidosis and Wegener's granulomatosis, primary or secondary neoplasms, enlarged ethmoid mucoceles. Secondary acquired obstruction of the canaliculi includes infections, skin burns, drugs for glaucoma, or chemotherapeutic agents such as fluorouracil.

Share article

Article information

rID: 43890
System: Head & Neck
Section: Gamuts
Tags: cases, ref
Synonyms or Alternate Spellings:
  • Nasolacrimal drainage apparatus obstruction

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    case 1
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.