Lacrimal sac diverticulum presenting as a lower eyelid mass with a secreting fistula

To the editor:A 12-month-old child was admitted to our department for treatment regarding his inner canthus mass.His parents complained epiphora and mucopurulent discharge of the left eye after formation of a mass located in the left lower eyelid and medial canthus over 3 months(Figure 1A).The mass increased in size gradually.This child was diagnosed as acute dacryocystitis and underwent probing for two times in another hospital.When he was 6 months old,he also had a similar mass which had resolved spontaneously.No history of sinus or systemic disease,trauma,or facial surgery was found.