AIM:To analyze the clinical features, computer tomography(CT)image findings and treatment experience of color Doppler ultrasound for children with periorbital dermoid cyst.

METHODS: The clinic data of 114 cases which dermoid cyst was illustrated by pathological histology after surgery was retrospectively analyzed. All patients were performed color Doppler ultrasound and some patients were underwent CT. Surgical incisions were designed according to the position of cyst.

RESULTS:Among 114 cases, 61 cases in right eye, 53 cases in left eye. The location of cyst was at superior temporal in 68 cases(59.6%), supraorbital in 27 cases(23.7%), medial superior in 13 cases(11.4%), medial inferior in 5 cases(4.4%), infraorbital in 1 case(0.9%). Cyst was adhered to periostea in 49 cases. Color Doppler ultrasound showed the clear cyst boundary in 100 cases(87.7%), hypoecho in 105 cases(92.1%), homogeneous in 61 cases(53.5%), fluid dark area in 4 cases and no-blood flow inside cyst in 107 cases(93.9%). Forty patients were performed by CT, and CT value ranged from -55～32Hu and bony destruction surrounding cyst was showed in 7 cases. According to the position of cyst, eye brow incision were designed in 72 cases, upper eyelid crease incision in 10 cases, skin incision upper the cyst in 30 cases, fornix incision in 2 cases. All patients were followed up for 3mo～4a, no complications and recurrence.

CONCLUSION:Combination with color Doppler and CT can make an accurate and locative diagnose of periorbital dermoid cyst in children before surgery. Surgical incision designed by lesion position and complete removal of the cyst wall is the key to get better cosmetic appearance and avoid recurrence.