PMC2634852_01
Radioactive iodine uptake of Patient #1 showing thyromegaly with diffuse tracer uptake of 42%.
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F1
The referring physician confirmed hypothyroidism biochemically (Table 1), however, a radioactive iodine (RAI) study he ordered showed increased uptake, which was reported as "consistent with hyperthyroidism" (Figure 1). A review of the accompanying radioiodine study showed diffuse and increased 24-hour uptake of 42% (Figure 1).
PMC2634852_02
Figure 2a Thyroid ultrasound of Patient #2 at presentation, showing diffusely enlarged gland. Right lobe: 4.4 cm x1.6 cm; Left lobe: 4.7 cm x 1.6 cm.. Figure2b. Thyroid ultrasound of Patient #2 after 2 months of iodine supplementation, showing remarkable shrinkage. Right lobe: 3.7 cm x 1.3 cm; Left lobe: 3.6 cm x 2.5 cm.
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F2
Her thyroid gland was diffusely enlarged to three times normal size, non-tender, firm in consistency and without bruit (figure 2A). On follow-up visit after two months, UI excretion had increased to 167 microg/24hr, and goiter had regressed (figure 2B).
PMC2634852_03
Radioactive iodine scan of Patient #4 showing four views of the thyroid gland demonstrating increased uptake in all lobes.
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F3
RAI scan ordered by the referring physician showed an enlarged thyroid gland with uniform tracer uptake (Figure 3) which was reported as being consistent with "hyperfunctioning thyroid gland".