To investigate the clinical and computed tomography (CT) characteristics of ovarian lesions in infants, children, and adolescents.

A retrospective analysis of the clinical and CT data was performed in 222 patients who were 20 years or younger with ovarian lesions. Patients’ age, medical history, symptoms, tumor marker levels, and CT imaging findings were recorded.

None.

Identification of the clinical and CT features of ovarian lesions in infants, children, and adolescents.

A total of 136 patients had abdominal pain, and 73 patients had palpable abdominal mass. The β-HCG was elevated in 4 and AFP was elevated in 16 of the 222 cases. A total of 235 lesions were found in 222 cases, including 75 non-neoplastic and 160 neoplastic lesions. Ovarian cyst exhibited homogeneous low density. The torsion of a normal-sized ovary demonstrated mild or no enhancement. The torsion associated with an ovarian mass demonstrated a thickened, hyperdense wall. Mature teratoma presented as a cystic mass, with bulk fat and coarse calcification. Immature teratoma appeared as a solid mass with foci of fat and fine calcification. Yolk sac tumor was shown as cystic–solid mass with intense enhancement of solid component. Wall and septation of benign epithelial tumors were relatively uniform in thickness; mural nodule was detected in borderline tumor; and malignant epithelial tumor was predominantly a solid mass with intense enhancement.

Ovarian cyst is the most common non-neoplastic lesion. Torsion of a normal-sized ovary was the second most common non-neoplastic lesion, almost always causing abdominal pain. Germ cell tumor has the highest incidence among neoplastic lesions. Fat and calcification are highly specific for germ cell tumor. The elevation of AFP and HCG levels in serum indicates germ cell tumor. Ovarian epithelial tumor is usually large, benign, and predominantly cystic. The combination of clinical and imaging features is helpful for correct diagnosis.