The nasolacrimal ducts drain the excess tears from our eyes into the nasal cavity. In<unk>  there this tube gets blocked on either end and as a result when mucoid fluid collects in the intermediate patent section it forms a cystic structure. The infection is often caused by: * injury to eye or nose area * nasal abscess * abnormal mass inside of the nose * inflammation * surgery (nasal or sinus) * cancer * sinusitis
Dacryocystocele
Cystocele
Lymphocele
Pseudomeningocele
Rectocele
Ureterocele
Galactocele
Urachal cyst