Question
As per the Weigert Meyer’s principle of ureter duplication, the ureter originating from the lower pole of the kidney inserts into the urinary bladder at which location?
| A. |
Lateral and cephalad to the upper pole ureter
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| B. |
Lateral and caudal to the upper pole ureter
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| C. |
Medial and cephalad to the upper pole ureter
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| D. |
Medial and caudal to the upper pole ureter
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Show Answer
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Correct Answer » A
Explanation
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Weigert–Meyer Rule
- Duplex collecting system results from duplication of ureteric bud.
- Rule:
- Upper pole ureter → inferomedial insertion
- Lower pole ureter → superolateral insertion
- “Upper pole obstructs, lower pole refluxes”
- Upper pole → ureterocele/obstruction
- Lower pole → vesicoureteral reflux
- Common presentations:
- Recurrent UTI
- Incontinence
- Hydronephrosis
- Flank pain
- Diagnosis:
- Ultrasound
- Voiding cystourethrogram (VCUG)
- Intravenous urography
- MR urography
