case_images: PMC9745052_01
case_images: Image of ultrasound: unicystic tumor (yellow arrow) in the left kidney with a clear boundary and uniform internal sound transmission, accompanied by a dilatation of the renal pelvis (red arrow).
case_images: fped-10-1045936-g001.jpg
case_images: PMC9745052_01_fped-10-1045936-g001.jpg
case_images: F1
case_images: The reexamined ultrasound showed a cystic tumor inside the left kidney, with a size of 4.6 x 3.9 cm, with a clear boundary, thin wall, and uniform internal sound transmission (Figure 1, yellow arrow).
case_images: Image of an abdominal enhanced CT: unicystic tumor in the left kidney with a clear boundary but without contrast filling. There was contrast filling in the renal pelvis.
case_images: fped-10-1045936-g002.jpg
case_images: PMC9745052_01_fped-10-1045936-g002.jpg
case_images: F2
case_images: The adjacent renal pelvis was dilated with a diameter of about 1.9 cm, and there was contrast filling in the renal pelvis (Figure 2).
case_images: Image of a laparoscopic decortication of the renal cyst. After incision of the cyst wall, the inner wall of the cyst became smooth, and the cyst became unicystic.
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case_images: F3
case_images: During the operation, a unicystic tumor in the middle and upper pole of the left kidney was revealed, the inner wall of the cyst was smooth, the cystic fluid was clear, and there was no obvious connection between the cyst and the renal pelvis (Figure 3).
case_images: Image of histopathological examination (HE, x100). The naive nephron was found in the pathological section.
case_images: fped-10-1045936-g004.jpg
case_images: PMC9745052_01_fped-10-1045936-g004.jpg
case_images: F4
case_images: Immature nephrons of different sizes/stages of differentiation were found in the histological sections (Figure 4).