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NIDDK kidney stones symptoms severe flank pain radiates groin hematuria
Answer: b) Renal colic, most likely from a ureteric stone.
The clues are classic: sudden, severe unilateral flank pain radiating to the groin/genitalia, inability to remain still, right costovertebral-angle tenderness, and hematuria on urinalysis. Renal colic commonly causes severe flank-to-groin pain with blood in urine, as described in Tintinalli's Emergency Medicine (clinical features section) and by NIDDK kidney-stone guidance.
Why not the others:
- Pyelonephritis: usually fever, dysuria, systemic illness, and a more constant ache.
- Testicular torsion: acute scrotal pain/swelling with abnormal testicular findings.
- Strangulated hernia: painful irreducible groin mass with obstruction features.
- Acute prostatitis: fever, urinary symptoms, pelvic/perineal pain, tender prostate.
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