A 67 year-old woman comes to the emergency department because of increasingly severe left sided back pain during the past two days. The pain started near the bottom of her ribcage and then moved down her back during the past 24 hours. It has remained in her low back for 12 hours. Physical examination shows normal shows no abnormalities. Urinalysis shows blood. A urinary tract obstruction due to renal calculi is suspected. A noncontrast CT shows a calculus at the level of L5. Which of the following is the most likely location of the calculus?
A 67 year-old woman comes to the emergency department because of increasingly
severe left sided back pain during the past two days. The pain started near the bottom of
her ribcage and then moved down her back during the past 24 hours. It has remained in
her low back for 12 hours. Physical examination shows normal shows no abnormalities.
Urinalysis shows blood. A urinary tract obstruction due to renal calculi is suspected. A
noncontrast CT shows a calculus at the level of L5. Which of the following is the most
likely location of the calculus?
a. At the point where their pelvis drains into the ureter
b. At the point where the ureter courses over the pelvic brim
c. At the ureterovesical junction
d. In the membranous urethra above the urogenital diaphragm
e. In a minor calyx
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