Which of the following description is Not a common CT manifestation of retinoblastoma？ （）

Which of the following description is Not a common CT manifestation of retinoblastoma？ （）
A.Located on the eyeball wall
B.Intracranial mass
C.Low density of tumor
D.Tumor enhancement is obvious
E.The tumor may extend outside the eyeball
正确答案：Low density of tumor