A 26-year-old woman with pulmonary metastasis of thyroid cancer underwent a total thyroidectomy and cervical lymph node dissection followed by 2 courses of 131 I therapy. The posttherapeutic whole-body scan after the second dose of 131 I therapy showed diffuse tracer uptake in both lungs. Besides this, there is a local abnormal radiotracer uptake in the left axillary region. SPECT/CT images localized this abnormal radioactivity in a subcutaneous, oval-shaped, approximately 2.2-cm slightly hyperdense lesion, which was pathologically confirmed as an epidermal cyst.
A 75-year-old man with suspected prostate cancer underwent a 99mTc-MDP bone scan to exclude the possibility of bone metastasis. Scans revealed areas of increased tracer uptake in a symmetric distribution on both sides of the pelvis. Further SPECT/CT imaging showed focal 99mTc-MDP accumulation within 2 cystic lesions on both sides of the bladder. Subsequent x-ray cystography showed contrast agent filling within both cystic lesions, which suggested double bladder diverticula. Eventually, these 2 cystic lesions were confirmed by surgery and pathology as double congenital bladder diverticula.
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