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Renal cyst

  Renal cysts are the most common structural abnormality of the kidney in adults. They can be unilateral or bilateral, one or more, usually about 2 cm in diameter, and 10 cm in diameter, mostly in the male. With age, the increasing incidence of simple renal cysts generally no symptoms, only when the cyst caused by vascular occlusion or urinary tract obstruction may occur when the corresponding performance, may have an impact on renal function. When the cyst more than 5cm, should be the appropriate treatment, including cystic fluid aspiration and intracapsular injection of sclerotherapy or surgery.

  We usually see the renal cysts, the majority of simple renal cysts, and hereditary renal cystic disease, the proportion of relatively small. Less than 20 years of age there is almost no simple renal cysts, if less than 20 years old individuals with cysts, to be highly suspected kidney developmental problems or genetic renal cystic disease. With the increase of age, the incidence of renal cysts is higher and higher, 30 to 40 years old the incidence of simple renal cysts was about 10% to 80 years of age, the incidence of simple renal cysts reached 50%. Simple renal cysts in men.

  Pathogenesis

  Simple renal cyst is not a congenital or hereditary kidney disease, but acquired the formation. Is generally believed that simple renal cysts derived from the renal tubular diverticulum. With age, more and more tubular diverticula, to 90 years of age, each collection tube diverticulum number up to three, it can explain the simple renal cysts with the trend of increasing the incidence of age. Cysts may be unilateral or bilateral, and may be one or more. Generally located in the cortex deep or medullary, the diameter generally about 2cm, there are 10cm in diameter cysts. Under the microscope, the wall was covered by a monolayer of flat epithelium. Cyst content and plasma filtrate is similar to the cyst fluid update rate as high as 20 times a day.

  Clinical manifestations

  Simple renal cysts generally no symptoms, but when the cyst caused by vascular occlusion or urinary obstruction can occur when the corresponding performance. The disease often due to other diseases do urinary tract imaging examination found that in recent years more and more physical examination, including the abdominal B-type ultrasound, simple renal cyst detection rate increased.

  The original has been that simple cyst does not affect renal function. However, renal CT examination of the image analysis showed that by age, gender, primary renal disease and other correction, renal cyst patients than patients without renal cysts have a higher serum creatinine level, and the more the number of cysts, serum creatinine The higher the level. The results suggest that simple renal cysts may have an impact on renal function.

  an examination

  Simple renal cyst diagnosis depends mainly on imaging, such as B-type ultrasound or CT examination.

  diagnosis

  Simple diagnosis of renal cysts rely mainly on imaging studies.

  Differential diagnosis

  Renal parenchymal cysts and the following diseases need to identify: ① renal solid tumor necrosis liquefaction; ② in the renal cyst on the basis of cancer, this is extremely rare; ③ autosomal dominant polycystic kidney disease.

  treatment

  As simple as renal cysts asymptomatic, little effect on renal function and surrounding tissue, so no treatment, as long as 6 months to 1 year follow-up. If the cyst diameter is larger, more than 5cm or produce symptoms of surrounding tissue compression, causing urinary tract obstruction, the need for cystic fluid aspiration and intracapsular injection of hardening agent. If the cyst is large, more than 10cm in diameter may require surgery.

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