case_images: PMC11324261_01
case_images: A 6-year-old girl presented with left lower eyelid swelling. A 5 x 10 mm translucent mass was seen at the left inferior fornix when the lower eyelid had everted.
case_images: cop-2024-0015-0001-540126_F01.jpg
case_images: PMC11324261_01_cop-2024-0015-0001-540126_F01.jpg
case_images: F1
case_images: A large, non-tender, movable, translucent, cystic mass size 5 x 10 mm was found at the left inferior fornix (shown in Fig. 1).
case_images: Orbital CT (upper row from left to right: non-contrast, coronal view, venous phase coronal view, lower row from left to right, venous phase sagittal view, sagittal view bone window) revealed a single well-defined, hypodensity lesion at post-septal space, abutting inferior of the left globe without contrast enhancement. No bony remodeling or destruction was found.
case_images: cop-2024-0015-0001-540126_F02.jpg
case_images: PMC11324261_01_cop-2024-0015-0001-540126_F02.jpg
case_images: F2
case_images: After contrast injection, no enhancement was shown (shown in Fig. 2). In the bone window, bony destruction or remodeling was not seen (shown in Fig. 2).
case_images: Intraoperative findings show a cystic lesion located in sub-tenon space, extending to the anterior orbit. The lesion was removed without rupturing the cyst wall, size 10 x 8 x 3 mm.
case_images: cop-2024-0015-0001-540126_F03.jpg
case_images: PMC11324261_01_cop-2024-0015-0001-540126_F03.jpg
case_images: F3
case_images: Intraoperatively, the cyst was found in sub-tenon space, extending to the anterior orbit, size 10 x 8 x 3 mm (shown in Fig. 3).
case_images: Hematoxylin and eosin staining 10x (left) shows cyst channels, lined by endothelium without intraluminal cells, consistent with simple lymphatic malformation. 40x (right) shows endothelial cells lining.
case_images: cop-2024-0015-0001-540126_F04.jpg
case_images: PMC11324261_01_cop-2024-0015-0001-540126_F04.jpg
case_images: F4
case_images: Hematoxylin and eosin stain revealed the cyst channels are lined by endothelium without intraluminal cells (shown in Fig. 4).
case_images: In a 1-year follow-up period, no recurrent mass was found. The inferior fornix is normal, with no symblepharon.
case_images: cop-2024-0015-0001-540126_F05.jpg
case_images: PMC11324261_01_cop-2024-0015-0001-540126_F05.jpg
case_images: F5
case_images: Extraocular movements were full (shown in Fig. 5).