Figure 1. Patient No.1, a 37-year-old female with primary lacrimal sac lymphoma (DLBCL) of the right eye.

A: Clinical photograph. B: Computed tomography dacryocystography (CT-DCG), showing right post-saccal stenosis, a medial canthus soft tissue mass, and no bone destruction. The arrow indicates the contrast agent (nasolacrimal duct, coronal view). C: Magnetic resonance imaging (MRI), showing the mass had T1 hyperintensity. D: Postoperative pathological examination.