22wk Pregnant Lady

small cystic mass 9x4mm , in the posterior fossa , Blake’s pouch cyst , can not be excluded 

This same patient at 26 wk

There’s focal Aneurysmal dilatation of the intrahepatic umbilical vein 10mm, normal ductus venosus flow seen, Also presence of small Blakes pouch cyst 4x5mm

At 29wk pregnancy

Focal aneurysm dilatation of the hepatic umbilical vein 16 in length , 12mm in diamter. 

And with Increase in amount of liquor.  Amniotic fluid index = 30cm AC =80% , Hepatomegally ?

EN