This study aimed to retrospectively evaluate the efficacy of radiotherapy for primary intraocular non-Hodgkin lymphoma (PIOL). Between May 1998 and October 2010, 22 immunocompetent patients (four men, 18 women; median age 70 years, range 53-79 years) were diagnosed with PIOL. Magnetic resonance imaging showed no intracranial involvement in any patient. Patients received radiotherapy at a median total dose of 30 Gy (range 30-40 Gy). Three-year overall survival, progression-free survival and local control rates were 89% (95% confidence interval [CI]: 75, 103), 49% (95% CI: 24, 73) and 95% (95% CI: 86, 105) over a median of 36 months of observation, respectively. Twelve patients (55%) had intracranial relapse at a median of 28 months after initiation of radiotherapy. Visual acuity improved or was stable in 81% of treated eyes. The only grade ≥ 3 toxicity was cataract formation (five patients). Radiotherapy without chemotherapy for PIOL achieved high local control rates with acceptable toxicities.
This new semiquantitative estimation method is reproducible and objective, especially when the examinations are performed repeatedly for evaluation of both therapy and follow-up.
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