Table 2.

Choroidal melanoma characteristics, plaque radiotherapy parameters and initial RM treatment

Visual acuity prior to plaque, n (%)
20/20 to 20/50 (logMAR 0 to 0.4)	7 (88)
20/60 to 20/200 (logMAR 0.5 to 1)	1 (12)
Tumour size: mean (median, range)
Basal dimension	11.1 (11.9, 7.1–13.9)
Thickness	4.3 (2.8, 2.3–10.9)
Proximity to optic disc	3.2 (2.5, 0.5–9.4)
Proximity to fovea	1.8 (1.5, 0–5.7)
Isotope: mean (%)
Palladium-103	7 (88)
Iodine-125	1 (12)
Mean radiation dose, Gy: mean (median, range)
Apex	69.4 (70.2, 48.2–87.4)
Optic disc	56.2 (9.0–125.1)
Fovea	81.5 (75.2, 22.7–138.2)
AJCC stage: stage (n)	T1(4), T2(2), T3(2)
Months to onset of RM: mean (median, range)	26 (25, 12–44)

AJCC, American Joint Committee on Cancer; RM, radiation maculopathy.