Fig. 4.

Left parathyroid adenoma in 43 yrs. old male, with Elevated PTH of 11.5 pmol/L. (a) USG neck shows hypoechoic solid focal lesion seen related to the undersurface of the left thyroid lobe measures about 1.37 × 0.61 cm with separable hyperechoic line from thyroid tissue and increased vascularity inside on color Doppler. (b) Early images: (first two images) Rather homogenous radiotracer uptake is displayed by the thyroid gland with a large ovoid area of focal radiotracer uptake noted abutting the inferior pole of left thyroid lobe, On Late static (second two images) there is partial washout of the tracer from the thyroid gland with tracer retention abutting the inferior pole of left thyroid lobe. (c) SPECT/CT imaging localizes left paratracheal soft tissue density lesion abutting the posterior aspect of the inferior pole of left thyroid lobe.