Grassi Lakes, Canmore

Hydronephrosis

Everything on Hydronephrosis in one place — guides for parents, the clinician series and evidence notes.

For parents

Hydronephrosis on the prenatal scan

What an enlarged renal pelvis and calyces mean, what the grade tells you, when ultrasound and tests are done after birth, and who needs preventive antibiotics.

For clinicians

Written for healthcare professionals; a one-time confirmation appears on first visit.

Hydronephrosis · Part 1

What we measure, and how we grade it

Causes, and APD, SFU, Onen and UTD: what each system measures and misses, and what grade says about natural history.

Hydronephrosis · Part 2

Who needs what, and when, after birth

Timing of the first ultrasound, follow-up by risk group, who needs VCUG and diuretic renography, and the evidence on prophylaxis.

Hydronephrosis · Part 3

How the ureter forms, and why it dilates

From the ureteric bud, the ureter–bladder connection and wall differentiation to the muscle arrangement and collagen of the narrow segment in UPJO and primary obstructive megaureter.

For medical professionals

This section contains academic material for medical students, residents, and clinicians — including surgical detail and technical terminology. Continue?