Fig. 1

Magnetic resonant imaging. a Axial T2 obtained in 2009 shows a well encapsulated and mixed-intensity circular lesion with 3 septate cystic spaces before the first operation. b Recurrent lesion 9 months after the initial surgery. c Appearance of the lesion in 21 months after the previous surgery. d–f A large heterogeneous multicystic intraconal mass occupying almost the entire posterior orbit. g–i The orbit was filled with gelatin sponge, with no visible neoplasm signals 1 week after total resection. a, b, c, e, h T2 image, d, g T1 image, and f, i post-contrast T1 image