Résumé
Objective To investigate the CT imaging features and its diagnostic value in patients with epibulbar dermoid and dermolipoma. Methods Twelve cases with epibulbar dermoids and dermolipomas were retrospectively analyzed. There were 5 dermoids and 7 dermolipomas, and a distinct female predominance (11/12). The lesions located at the external canthus, and were almost always uniocular and single (right=9, left=3). Transverse plain CT scan was performed in all patients, contrast enhanced CT scan in 5 cases. The clinical aspects, pathological features, and CT findings were then described. Results Crescent-shaped hypodensity lesion attached to the epibulbar was detected in all cases on CT scan. The diameter ranged from 8 mm?5 mm to 25 mm?15 mm. The lesion had a thin wall (1- 3 mm) under the conjunctiva lateral, and could have middle enhancement. Conclusion CT can show the lesion′s range and characteristics, as well as the relationship with the adjacent structures. CT has great directive value for operating on these tumors, and reducing the complications.