Fetal hydatid cystic aneurysms are primarily due to abnormal lymphoid tissue development during the embryonic period. In congenital lymphoid tissue malformations, part of the lymphatic system develops from a cystic cavity at the junction of the internal jugular vein and the subclavian vein. During embryonic development, some of the lymphatic tissue continues to grow, resulting in the formation of a multilocular sac lined with endothelium and lymphatic fluid called a hydatid cystic tumor. Hydatid cystic neoplasms are round, ovoid, or lobulated in the posterior triangle of the neck and supraclavicular fossa. It may infiltrate in all directions. The wall of the sac is smooth, thin and translucent. It does not adhere to the skin and surrounding tissues. Hydatid cystic tumors are often multicystic or multilocular. The sacs are usually filled with colorless or yellowish, clear lymphatic fluid, or bloody when accompanied by hemorrhage. If you are diagnosed with fetal hydatid cysticercosis, you should seek medical advice and treatment under the guidance of your doctor without delay to avoid delay. Pay attention to rest on weekdays and keep a regular routine. A comprehensive examination can not only determine whether the fetus is healthy or not, but also find out the physical health of the pregnant woman herself. Pregnant women should pay attention to the prenatal examination during pregnancy. During pregnancy, pay attention to more rest, at the same time should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.