Xiao Ming's mother found a small corner of the lower right corner of Xiao Ming, Xiao Ming cried when there is a little bit of tears, quickly
Xiao Ming's mother found a small corner of the lower right corner of Xiao Ming, Xiao Ming cried when there is a little bit of tears, quickly took the child to the hospital to check, I told her that this is a congenital lacrimal sac fistula.
Congenital lacrimal fistula is due to abnormal development of the embryonic period of lacrimal duct, the abnormal pipeline is formed between the lacrimal sac and nasal cavity or the skin. The first case of congenital lacrimal sac fistula was first described by Rasor in 1675. Congenital lacrimal fistula and fistula of lacrimal sac is the mouth for unilateral or bilateral, and according to the position of the lacrimal sac fistula were divided into lateral and medial fistula fistula. The fistula from lacrimal sac directly in the mouth for medial nasal fistula, clinical rare also is not easy to detect. The lateral nasal lateral skin fistula outside canthus ligament below position.
The incidence of congenital lacrimal sac fistula was about 0.05%, with no gender and racial tendency, mostly unilateral and sporadic, with few family history, and the genetic mode could be autosomal dominant or recessive . Can be combined with lacrimal duct and systemic development of various genetic diseases, and lacrimal puncta are absent, strabismus, Down syndrome, Charge syndrome, hypertelorism, nasal orbital ethmoid meningocele, urethral cracking, EEC syndrome, this is more common in bilateral congenital lacrimal fistula.