case_images: PMC10471426_01
case_images: Right lateral neck mass during Valsalva maneuver.
case_images: 10-1055-a-2130-3269-i2022050662cr-1.jpg
case_images: PMC10471426_01_10-1055-a-2130-3269-i2022050662cr-1.jpg
case_images: FI2022050662cr-1
case_images: A 7-year-old boy, weighing 21 kg, was referred to our outpatient clinic for a permanent soft swelling on the right lateral region of the neck, with no history of trauma, previous surgery, or other significant signs and symptoms ( Fig. 1 ).
case_images: (
  A
  ) Ultrasound (US) of the right internal jugular vein at rest and at Valsalva maneuver; (
  B
  ) right and left internal jugular veins comparative size; (
  C
  ) right internal jugular vein color Doppler US demonstrating normal venous flow without thrombosis at rest and (
  D
  ) under Valsalva maneuver. (
  E
  ) Computed tomography (CT) contrast scan showing right internal jugular vein ectasia (shown by the arrow).
case_images: 10-1055-a-2130-3269-i2022050662cr-2.jpg
case_images: PMC10471426_01_10-1055-a-2130-3269-i2022050662cr-2.jpg
case_images: FI2022050662cr-2
case_images:  Neck US showed, at rest, right internal jugular axial 16 x 11 mm ectasia increasing to 22 x 27 mm during the Valsalva maneuver ( Fig. 2 ). Neck-thorax contrast CT scan confirmed a fusiform dilatation of the right internal jugular vein (about 22 x 17 mm at rest; Fig. 2 ), without endoluminal filling defects compatible with thrombus along its entire course.