Visual outcomes and late complications in paediatric orbital rhabdomyosarcoma

Background: Orbital rhabdomyosarcoma is a rare but important malignancy for an ophthalmologist. We aimed to review the management and outcome, including late orbital complications and visual acuity over 25 years from a specialist paediatric ophthalmology department. Design: This was a retrospective longitudinal case series. Participants: All patients presenting to our institution between December 1989 and December 2014 with a histopathological diagnosis of rhabdomyosarcoma originating from (primary) or invading into the orbit (paranasal) were included. Methods: The oncology and ophthalmology databases were cross referenced to identify patients. Main Outcome Measures: Baseline demographics, chemotherapy, surgical and radiation dose, visual acuity, ocular and systemic complications, local and distant recurrence and mortality were recorded for each patient. Outcomes were reported with descriptive statistics. Results: Eighteen patients were included. Median age was 4.3 years (range 4 months to 16 years) with average follow-up of 9 years. The 5-year disease-specific survival was 100% for the orbital group and 25% for the paranasal group; 29% of the orbital group maintained vision better than 6/12 in their treated eye, and the overall globe conservation rate was 71%. The most common ocular complications were cataract and keratopathy in both the orbital and paranasal groups. Other ocular complications included orbital hypoplasia or fat atrophy, eyelid malposition and lacrimal duct stenosis. Conclusions: Ophthalmic late effects are seen in a significant proportion of patients with orbital rhabdomyosarcoma. There is excellent survival in these patients, and continued efforts should be made to reduce the late effects of therapy.