Fig. 4

A 64-year-old female patient with right breast cancer underwent lumpectomy and received radiotherapy with a large toxic thyroid nodule confirmed to be a follicular neoplasm with Hurthle cell changes, patients receive anti-thyroid drugs. PET/CT (a, b) revealed enlarged right thyroid lobe showing a solid nodule (45 × 38 × 67 mm) with foci of macro-calcifications and areas of cystic degenerations, no significant abnormal increased FDG utilization. CT & PET (c, d) shows clear surgical bed of breast, the overlying skin is still diffusely thickened. CT (e), PET (f), and PET/CT (g–k) show metabolic active right hepatic lobe focal lesion is SUVmax. 10.5. Diffuse increased tracer fixation is seen in a segment of descending colon, measuring about 60 mm with focal circumferential mural thickening SUVmax. 8.1. Colonoscopy and biopsy revealed rectal infiltrating adenocarcinoma