Infundibular Stenosis

The differential consideration for infundibular stenosis.

• Tumor/mass: Transitional cell carcinoma, renal cell carcinoma, renal sinus lipomatosis, parapelvic cyst.
• Congenital: Anatomic variant (e.g., crossing vessel). Fraley syndrome (congenital infundibular stenosis).
• Calculus:
• Ischemia: Renal infarction.
• Trauma:
• Tuberculosis: Uncommon, but characteristic description of an amputated calyx.

References

• Brennan RE, Pollack HM. Nonvisualized ("phantom") renal calyx: causes and radiological approach to diagnosis. Urol Radiol. 1979;1(1):17-23.
• Lucaya J, Enriquez G, Delgado R, Castellote A. Infundibulopelvic stenosis in children. AJR Am J Roentgenol. 1984 Mar;142(3):471-4.
• Wang LJ, Wu CF, Wong YC, Chuang CK, Chu SH, Chen CJ. Imaging findings of urinary tuberculosis on excretory urography and computerized tomography. J Urol. 2003 Feb;169(2):524-8.