A False Positive I-131 Metastatic Survey Caused by Radioactive Iodine Uptake by a Benign Thymic Cyst

<div>Surgical pathology sections of 9.0 cm multilocular thymic cyst. (a) Cyst walls lined by simple low-cuboidal epithelium. (b) Cyst wall lined by simple columnar mucinous epithelium with goblet cells. (c) Fibrous stroma with glandular elements and numerous hemosiderin-laden macrophages. (d) Remnant of normal involuting thymic tissue adjacent to cystic spaces.</div>

Case Reports in Endocrinology

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Figure 2

Figure 2: A False Positive I-131 Metastatic Survey Caused by Radioactive Iodine Uptake by a Benign Thymic Cyst 