Can you clarify what urinary tract malformation really is?

Too many: There are too many urinary malformations to list in the amount of space available. The malformations may vary with the gender of the subject. It may be urinary reflux, excystrophy of the bladder, persistent urachal duct, epispadias/hypospadias, urethral stricture, fistulas etc.

Anywhere along tract: Means: malformed part of the urinary tract, otherwise known as congengenital deformity, +may or may not be serious.Can be genetic or something "out of the blue".Examples:congenital cystic kidneys where one or both kidneys consist of a collection of cysts.Hydronephrosis: kidney swollen by blockage.Bladder reflux-valves malformed + permit urine to back up.Urethral valves-urinary blockage to outflow.