Growth curves for all three human choroidal melanoma cell lines. Maximum tumor area (mm2) was determined from measurements of multiple H&E-stained sections. Curves are monoexponential fits of the data with t = days of tumor growth. C918: area = 0.073e0.148t, n = 20, r2 = 0.689; M619: area = 0.101e0.128t, n = 14, r2 = 0.656; OCM-1: area = 0.047e0.150t, n = 17, r2 = 0.667; mean of all tumors: area = 0.080e0.148t, n = 12, r2 = 0.923.