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Condition
What is the urachus? The urachus is a remnant of a channel between the bladder and the umbilicus (belly button) where urine initially drains in the fetus during the 1 st trimester of pregnancy.  The channel of the urachus usually seals off and obliterates …
Condition
What is a ureteropelvic junction obstruction?  A ureteropelvic junction obstruction (UPJO) is a blockage of urine flow from the renal pelvis to the ureter.  The renal pelvis is the part of the kidney that collects the urine made by the kidney and the …