Diagnosis of Parapelvic Kidney Cysts
The disease is more common in patients over the age of 50, asymptomatic parapelvic cysts similar male to female ratio, clinical symptoms are more common in men. Clinical manifestations may include discomfort lower back pain, hematuria, hypertension, or with capsule stones, some patients are asymptomatic, accidentally discovered in the examination. B ultrasound, IVU and CT examination can confirm the diagnosis. B ultrasound can be seen near the renal hilum a liquid dark area, and can display the size of the cyst when the cyst extension to the renal sinus caused by the renal pelvis and hydronephrosis or cysts located in the renal sinus depths, often misdiagnosed as hydronephrosis. IVU examination may detect kidney door or renal sinus a round mass oppression of the renal pelvis, calyces or upper ureteral trace the arc pressure, deformation, displacement or stretch, such as cysts and renal pelvis traffic is swollen objects without contrast agent, the smaller cysts can be no such change. CT scan is the most reliable diagnostic method to display the pelvis next to the community a clear and uniform low-density oval-shaped mass of CT value of 0 ~ 2 0HU, enhanced before and after the CT value changed little, can be diagnosed as a benign cyst next to the pelvis; pelvis adjacent cyst in the renal sinus, large cysts can be highlighted to the renal hilum; renal cysts were located in the renal cortex, were round, for single or multiple. B ultrasound and CT examination is useful in differential diagnosis.
The classification of parapelvic cysts
From the histological point of view, parapelvic cyst can be divided into the urine-derived and non-urine-derived, the latter can be divided into serous and lymphatic. Pelvis next to the cyst and more caused by congenital factors, but most patients after 50 years of age parapelvic cyst, and previous frequent urinary tract infection, obstruction or lithiasis history, may be chronic inflammation of the pelvis lymphatic obstruction, resulting in local lymphangiectasia, renal sinus local vascular disease or vascular disuse atrophy can also result in serous exudation to the renal sinus plane, confined to the premises and the formation of serous cyst. Urinary cyst renal cyst is caused by the extending of the cysts to the renal hilum.
