cancerous ureteral stricture
Introduction
Introduction Ureteral tumors can be divided into benign and malignant according to the nature of the tumor. Benign ureteral tumors such as polyps, malignant tumors such as transitional cell carcinoma, transitional cells with squamous cell carcinoma, mucinous carcinoma, etc. Ureteral tumors are rare in clinical practice. The age of onset is 20 to 90 years old, and men are more than women, about 4:1. Primary ureteral tumors originate in the ureter itself, with malignant tumors, most of which (90%) are transitional cell carcinomas.
Cause
Cause
Benign ureteral tumors such as polyps, malignant tumors such as transitional cell carcinoma, transitional cells with squamous cell carcinoma, mucinous carcinoma, etc.
Examine
an examination
Hematuria is the most common initial symptoms. Gross hematuria, low back pain and abdominal mass are the three common symptoms of ureteral cancer, but they are non-specific. They are easily confused with kidney, bladder tumor, ureteral calculi, hydronephrosis and other diseases. .
Diagnosis
Differential diagnosis
(1) Intravenous renal pelvis ureterography (IVP): It is the most important examination method for upper urinary tract tumors. It is usually characterized by renal pelvic filling defects and expanded stagnant water. The appearance of filling defects is rough and irregular.
(2) Retrograde renal pelvic ureterography: retrograde angiography can be used when the kidney of the IVP, the ureter is not developed, or the quality of the development is poor. When there is a secondary defect in the distal end of the filling defect (Bergman sign), it is meaningful for the diagnosis, and the stone The distal ureter of the benign obstruction does not dilate. Renal sputum urine can be taken for cytological examination before retrograde angiography.
(3) CT, MRI examination: 3mm thin scan of suspicious parts of other imaging examinations, often found ureteral tumors, and understand the extent of tumor infiltration for staging. MRI can show the location of obstruction when there is obstruction in the ureter.
It is easy to be confused with kidney, bladder tumor, ureteral calculi, hydronephrosis and other diseases. It is necessary to do imaging examination to confirm the diagnosis.
