Acute cystitis
Infected kidney stone
Vascular
Abdominal aortic aneurysm
Renal artery embolism
Renal vein thrombosis
Aortic dissection
Mesenteric ischemia
Renal<unk> 
Papillary necrosis
Renal cell carcinoma
Obstructive uropathy
May or may not be due to nephrolithiasis
Renal infarction
Renal hemorrhage
Ureter
Nephrolithiasis
Blood clot
Stricture
Tumor (primary or metastatic)
Bladder
Tumor
Varicose vein
Cystitis
GI
Biliary colic
Pancreatitis
Perforated peptic ulcer
Appendicitis (appendix may be pushed to RUQ in pregnancy)
Inguinal Hernia
Diverticulitis
Cancer
Bowel obstruction
Gynecologic
Ectopic Pregnancy
PID/TOA
Ovarian cyst
Ovarian torsion
Endometriosis
GU
Testicular torsion
Epididymitis
Other
Shingles
Lower lobe<unk> eumonia
Retroperitoneal hematoma/abscess/tumor
Epidural abscess
Epidural hematoma
Rib contusion/fracture
Abdominal aortic aneurysm
Renal artery embolism
Renal vein thrombosis
Aortic dissection
Mesenteric ischemia<unk> 
Papillary necrosis
Renal cell carcinoma
Obstructive uropathy
May or may not be due to nephrolithiasis
Renal infarction
Renal hemorrhage
May or may not be due to nephrolithiasis
Nephrolithiasis
Blood clot
Stricture
Tumor (primary or metastatic)
Tumor
Varicose vein
Cystitis
Biliary colic
Pancreatitis
Perforated peptic ulcer
Appendicitis (appendix may be pushed to RUQ in pregnancy)
Inguinal Hernia
Diverticulitis
Cancer
Bowel obstruction
Ectopic Pregnancy
PID/TOA
Ovarian cyst
Ovarian torsion
Endometriosis
Testicular torsion
Epididymitis
Shingles
Lower lobe<unk> eumonia
Retroperitoneal hematoma/abscess/tumor
Epidural abscess
Epidural hematoma
Rib contusion/fracture
Genitourinary infection
Acute cystitis ("UTI")<unk> 
Urethritis
Chronic cystitis
Infected nephrolithiasis
Prostatitis
Epididymitis
Renal abscess/perinephric abscess
Emphysematous<unk> 
Nephrolithiasis
Urethral issue
Urethritis
Urolithiasis
Urethral foreign body
Urethral diverticulum
Allergic reaction (contact dermatitis)
Chemical irritation
Urethral stricture or obstruction
Trauma to vagina, urethra, or bladder
Gynecologic
Vaginitis/cervicitis
PID
Genital herpes
Uterine/bladder/vaginal prolapse
Fistula
Cystocele
Other
Diverticulitis
Behavioral symptom without detectable pathology
Acute cystitis ("UTI")<unk> 
Urethritis
Chronic cystitis
Infected nephrolithiasis
Prostatitis
Epididymitis
Renal abscess/perinephric abscess
Emphysematous<unk> 
Urethritis
Urolithiasis
Urethral foreign body
Urethral diverticulum
Allergic reaction (contact dermatitis)
Chemical irritation
Urethral stricture or obstruction
Trauma to vagina, urethra, or bladder
Vaginitis/cervicitis
PID
Genital herpes
Uterine/bladder/vaginal prolapse
Fistula
Cystocele
Diverticulitis
Behavioral symptom without detectable pathology
Pyelonephritis
Acute cystitis
Infected kidney stone
Glomerulonephritis
Vascular
Emphysematous pyelonephritis
Abdominal aortic aneurysm
Renal abscess