Figure 11. A, Urachal cyst. The cyst is infected and contains faintly echogenic fluid. B, Urachal cyst. The anterior wall of the tense cyst produces reerberation artifacts.

• 图11A，脐尿管囊肿，此囊肿已受感染，内部含有微弱回声的液体。B，脐尿管囊肿，紧绷的囊肿前壁产生反射伪影。