GAMUT H-21
INFUNDIBULAR NARROWING OR AMPUTATION (FOCAL OR DIFFUSE)


COMMON
1. Carcinoma (eg, transitional cell; renal cell)
2. Normal variant (eg, crossing vessel)
3. Renal sinus lipomatosis or mass
4. Spasm or irritability (eg, acute pyelonephritis; trauma; hemorrhage)


UNCOMMON
1. Abscess; carbuncle; nephronia
2. Congenital infundibular stenosis (Fraley S.)
3. Extrarenal pelvis
4. Extrinsic compression
5. Infarct (renal)
6. Neoplasm, other benign or malignant (eg, angiomyolipoma; lymphoma G; squamous cell carcinoma)
7. Parapelvic cyst (simple; hydatid)
8. Postoperative (eg, partial resection)
9. Stricture, inflammatory
10. Tuberculosis ; other infection (eg, brucellosis )





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