摘要To the Editor:A 32-year-old Chinese woman,complained diplopia,exophthalmos,and upper-right orbital pain and was admitted into the hospital in July 2009.Computerized tomography (CT) scan showed an upper-right orbital mass,measured 25 mm × 14 mm [Figure 1a].Extensive surgical resection of the tumor was done on January 14,2010.The histology confirmed the tumor was lacrimal gland adenoid cystic carcinoma (LGACC) [Figure 1b];tumor cells infiltrated into the orbital soft tissue but were free of the orbital bone.Three-dimensional conformal external beam irradiation on the upper-right orbital area was implemented at 2 weeks after surgery with the total dose of 66GY/33F.The patient was scheduled to follow-up periodically after irradiation.