Nasolacrimal Sac Diverticulum: A Case Series and Literature Review.

PURPOSE

To describe the demographics, presentation, treatment, and outcome in 10 cases of lacrimal sac diverticulum and to review the literature on this topic, and to determine the incidence of diverticula from a series of dacryocystograms.

METHODS

Data were collected for all consecutive patients with lacrimal sac diverticulum seen between 2003 and 2015, including patient demographics, clinical presentation, imaging findings, treatment, and follow-up. A systematic literature review was performed for cases of lacrimal sac diverticulum. A retrospective review of 400 consecutive dacryocystograms was performed to determine the incidence of lacrimal sac diverticulum.

RESULTS

Ten cases (9 patients) of lacrimal sac diverticulum are described, and a further 36 cases were discovered through a literature review. Epiphora, swelling, and dacryocystitis and/or diverticulitis were the most common presenting complaints. When all 46 cases are combined, lacrimal patency was demonstrated in 50% of cases. Dacryocystography diagnosed only 57% of patients with diverticulum, not helped by the addition of ultrasound or CT. The incidence of diverticulum was 3.2% on review of 400 consecutive dacryocystograms (1.6% per lacrimal system). Surgical management with dacryocystorhinostomy and/or diverticulum excision was effective in all 34 operated cases at resolving symptoms in the case series and literature review.

CONCLUSIONS

Lacrimal sac diverticula present with epiphora, medial canthal swelling, dacryocystitis, and/or diverticulitis. Dacryocystography, despite being the most sensitive radiologic test, is only 59% sensitive, and adjunctive CT and ultrasound have limited use. Surgical management is recommended because conservative management often fails. Dacryocystorhinostomy, diverticulum excision, or a combination thereof appears to be equivalent in achieving resolution of symptoms.