"Spider leg" deformity in excretory urogram occurs in
polycystic kidney, an autosomal dominant disease, common in females; excretory urogram shows 'spider leg' pattern - elongated and compressed renal pelvis with narrowed and stretched calyces over the cysts. ( Reference: emedicine.medscape.com/aicle/983281-workup )
Hydronephrosis
Polycystic kidney
Uretrocele
Renal agenesis
Urology