Hydrocele of the canal of Nuck: imaging findings
A 5-year-old girl presented with a palpable mass in the right inguinal region with occasional pain. Physical examination revealed smooth swelling in the right inguinal region which was tense but not tender. No thrill or bruit was seen over the swelling. Ultrasound examination of the right inguinal region was done using 7–12 MHz linear array transducer. There was well-defined sausage-shaped hypoechoic lesion with small internal septations (Fig. ) and the tail of the lesion was directed cranially and posteriorly. On color Doppler or power Doppler imaging no internal or peripheral vascularity was seen. On Valsalva maneuver the lesion did not change size or position.\nMRI was performed using 1.5-T system (Magnetom Avanto, Siemens, Erlangen, Germany) with a body coil. Axial and coronal T1 spin echo and T2 fast spin echo images of the inguinal region were obtained. Axial and coronal T2-weighted MR images showed a well-defined fluid intensity lesion in the right inguinal region with thin internal septa (Fig. ). The lesion did not communicate with the peritoneal cavity. The signal intensity of the lesion was similar to the urinary bladder. The imaging features were consistent with hydrocele of canal of Nuck. The lesion was removed surgically and histopathology revealed the diagnosis of hydrocele of canal of Nuck.