PMC9763370_01
Bilateral hydronephrosis (Ultrasound, right kidney on right side, left kidney on left side).
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Ultrasound and KUB demonstrated worsening bilateral hydronephrosis, right 19.3 cm and left 21 cm in length from his baseline (Fig. 1, Fig. 2).
Sacral tarlov cyst, 1.4cm (MRI T2).
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Tarlov cyst, lateralizing the lower sacral nerve roots within the sacral canal (Fig. 3). Tarlov cysts are sacs filled with cerebrospinal fluid commonly found at the sacral level of the spine incidentally, which rarely causes compression of the spinal cord or nerve roots.