Saturday, November 3, 2012

79 - Meyer-Weigert law/rule

Due to embryological maldevelopment an entity called duplex collecting system develops in few people.

This looks like two kidneys on one side with the upper pole of the lower kidney attached to the lower pole of the upper kidney.

This law states that in cases like these the ureters have a typical drainage pattern into the urinary bladder where the ureter of the upper kidney or collecting system drains inferior and medial to the opening of the lower kidney or collecting system.

Typically this condition is also associated with development of ureterocele of the ectopic inserted ureter causing obstruction and reflux.

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