Is autosomal recessive polycystic kidney disease very serious?

It is different: It usually is more serious than the autosomal dominant disease since it needs inheritance from both parents to be expressed i.e. Both genes are affected. It accordingly gets expressed at an earlier age in life. The longer duration of polycystic disease is a factor in predicting dialysis need.

Cystic kidney: yes. autosomal recessive kidney disease appears early in childhood and replaces kidneys with small cysts and scar. Kidney failure appears early