Teenager with pelvic fracture from trauma who cannot void

VCUG and RUG of urethral transection
AP (upper left) and oblique (upper right) images from a voiding cystourethrogram with the bladder filled through a suprapubic catheter shows extravasation of contrast into the base of the penis when the patient attempts to void. Oblique image from a retrograde urethrogram (below) shows an inability to fill the urethra completely during retrograde injection.

The diagnosis was urethral transection confirmed at cystoscopy.

Teenager with enuresis

US of urethral trauma
Transverse US of the prostatic urethra (upper left) shows a small round echogenic lesion with posterior shadowing in the center of the prostatic urethra which was not seen in the transverse US of the penile urethra (upper right). Sagittal US of the bladder (lower left) shows an echogenic lesion with posterior shadowing in the posterior aspect of the bladder that on transverse US of the bladder (lower right) resolved into two separate echogenic lesions with posterior shadowing.

The diagnosis was urethral trauma due to a metal axle from a toy car the patient had inserted into his urethra years before which had perforated the bladder creating a colovesical fistula and caused development of two bladder stones.

School ager with anti-NMDA encephalitis

US and CT of ovarian teratoma in NMDA encephalitis
Sagittal US of the pelvis (upper left) shows the right ovary to be enlarged and to contain an echogenic lesion within it superiorly. Axial (upper right) and coronal (lower left) and sagittal (lower right) CT with contrast of the abdomen shows an enlarged right ovary in the midline of the pelvis anterior to the rectum which has multiple low density lesions within it.

The diagnosis was ovarian teratoma.

Teenager with left scrotal mass

US of varicocele
Sagittal greyscale US of the left scrotum (upper left) shows a serpiginous appearing mass in the superior aspect of the scrotum which during a Valsalva maneuver (upper right) increases in size. Sagittal color US of the left scrotum (lower left) shows the mass to be composed of blood vessels that have increasing venous flow seen through them during a Valsalva maneuver (lower right).

The diagnosis was varicocele.