Treatment of conjunctival squamous cell carcinoma with photodynamic therapy.

PURPOSE: The aim of this study was to describe the clinical and angiographic response of squamous cell carcinoma (SCC) of the conjunctiva to treatment with photodynamic therapy (PDT).

DESIGN: Interventional case series.

METHODS: In a prospective study, three patients (62 to 86 years old) with SCC of the conjunctiva were treated with PDT. Patients received one to three treatments of verteporfin (6 mg/m(2) body surface area, intravenously). The light dose was calculated as 50 J/cm(2). All tumors were irradiated 1 minute after injection. The mean follow-up time was 8.6 months (7 to 12 months). Main outcome measurements were clinical and angiographic response and treatment-related side effects.

RESULTS: One week after treatment, angiographic occlusion of tumor vasculature and normal conjunctival vessels was observed in all patients. Tumor regression was noted in all patients 1 month after treatment. Two patients had complete regression (clinical and angiographic observation) after one or two treatments for the entire follow-up time. One tumor involved large aspects of the conjunctiva and cornea. In this case, only the treated areas showed tumor regression. PDT caused minimal temporary local irritation in two patients, and small conjunctival hemorrhages and mild transient chemosis in the three eyes directly after treatment. One patient had infusion-related back pain.

CONCLUSION: The preliminary results of this study suggest that PDT may be a valuable addition to the treatment of patients with SCC of the conjunctiva. However, longer follow-up is necessary to assess the duration and degree of tumor control.