Lacrimal Sac Diverticulum

Abstract

Lacrimal diverticula are cystic outpouchings, mostly communicating with the lacrimal sac [1--5]. An abnormal cellular cord stem from the lacrimal sac region during embryogenesis could contribute to diverticula. Diverticula of the lacrimal sac can be congenital, inflammatory, or post-traumatic [1]. Congenital lacrimal sac diverticula are rare anomalies that may present with epiphora, recurrent acute dacryocystitis, and medial orbital mass [1--5]. A high suspicion, careful examination, and imaging would help in diagnosis. The infero-lateral wall of the sac is a common area for the diverticula, since resistance to any expansion is least in this region as compared to other walls which have support of the periosteum and orbicularis. Diagnosis is usually by a plain dacryocystography (DCG) or by a CT or MR-DCG. Management usually consists of excision of the outpouching with or without a surgical bypass [1--5].