Fig. 1

Diagnostic imaging of the neck. A and B CT scan of head and neck showing an inhomogeneous, swollen right thyroid lobe with a hypodense lesion (2.2 cm) as indicated by the arrows and inflammatory reaction of surrounding tissue. The left thyroid lobe appears unaltered with a normal size. No abscess was detected. A A thin hyperdense structure is present in the right thyroid lobe that was later identified to be a fish bone. C and D Ultrasound diagnostic confirmed the diagnosis of an enlarged thyroid lobe with a volume of 28.6 ml compared to 9.2 ml of the left thyroid lobe. A central, circumscribed area was identified in the right thyroid lobe, mainly hyperechoic with hypoechoic fractions and paranodular homogenous thyroid tissue without increase of perfusion. Within the inhomogeneous area, a sharp foreign body was identified. This was suspected to be a fish bone (arrows)