Page 47 - Feline diagnostic imaging

4.3 ­enal Scintigrappy 41

(a)

(b)

Figure 4.8 (a) Multiple, large foci of hyperactive thyroid tissue extending from the normal thyroid region to the thoracic inlet. Like
the very large lesion in Figure 4.7, this pattern has also been associated with thyroid carcinoma. (b) Lateral view of the cat in (a).

(a)

(b)

Figure 4.9 (a) Hyperfunctioning right thyroid lobe and ectopic site at the thoracic inlet (arrow). There is also a small focus of uptake
in the midcervical region that may represent early abnormal thyroid activity. The thoracic inlet is a common location of ectopic thyroid
tissue, a location where it is difficult to detect by palpation or radiography. (b) Lateral view of the cat in (a).