NEET PG 2017
Q152
Question
What is the medical term for the triad of renal colic, which causes a swelling in the loin
that goes away after passing urine?
A. Kocher's triad
B. Saint's triad
C. Dietel's crisis
D. Charcot's triad
Answer
C. Dietel's crisis
Concept
The medical term for the triad of renal colic causing a swelling in the loin that resolves after
passing urine is Dietl's crisis. It occurs due to intermittent obstruction, classically by a kidney
stone. Renal colic refers to severe pain in the flank area (loin) caused by the passage of kidney
stones through the urinary tract, and the associated loin mass (hydronephrotic kidney)
disappears once urine flow is restored.
Option Analysis
A. Kocher's triad – Incorrect
Kocher's triad is classically described with rupture of a hydatid cyst — sudden abdominal pain,
urticaria, and disappearance of the previously palpable swelling — unrelated to renal colic.
B. Saint's triad – Incorrect
Saint's triad refers to the coexistence of cholelithiasis (gallstones), hiatal hernia, and
diverticular disease, with no established pathophysiological link between the three.
C. Dietel's crisis – Correct
Dietl's crisis describes the classic renal colic + intermittent loin swelling that resolves after
passing urine, occurring due to obstruction (commonly a kidney stone) causing transient
hydronephrosis.
D. Charcot's triad – Incorrect
Charcot's triad refers to fever, jaundice, and right upper quadrant pain seen in acute
cholangitis, not to renal pathology.
Exam Pearl
Renal colic + intermittent loin swelling relieved by passing urine = Dietl's crisis.
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