case_images: PMC4421885_01
case_images: 68-year-old man presented with fatigue, dry cough, shortness of breath, and unintentional weight loss. He was finally diagnosed with rectal squamous cell carcinoma. (a) Whole body maximum intensity projection (MIP) fluorodeoxyglucose positron emission tomography and computed tomography (FDG-PET/CT) image shows widespread metastasis (arrows) of rectal SCC. (b-d) FDG-PET/CT axial view of rectum show a 4-cm left eccentric intensely hypermetabolic rectal mass (arrows) with maximum standardized uptake value (SUVmax) of 10.6.
case_images: JCIS-5-22-g002.jpg
case_images: PMC4421885_01_JCIS-5-22-g002.jpg
case_images: F1
case_images: FDG-PET/CT exam revealed an intensely hypermetabolic rectal mass and perirectal lymphadenopathy, raising the suspicion for primary malignancy [Figure 1].
case_images: 68-year-old man presented with fatigue, dry cough, shortness of breath, and unintentional weight loss. He was finally diagnosed with rectal squamous cell carcinoma. (a-c) FDG-PET/CT axial view of skull shows a hypermetabolic 12-mm soft tissue nodule (arrows) within the left frontal scalp, with an SUVmax of 3.7. (d-f) FDG-PET/CT axial view of enlarged liver show innumerable hypermetabolic metastatic masses (arrows), many of which demonstrate central necrosis. (g-i) FDG-PET/CT axial view of pelvis show metastasis (arrows) in the left medial iliac wing and in the left gluteus medius muscle (SUVmax 5.2).
case_images: JCIS-5-22-g003.jpg
case_images: PMC4421885_01_JCIS-5-22-g003.jpg
case_images: F2
case_images: In addition, a large liver mass and a skin nodule on the forehead, both with high FDG uptake, were observed [Figure 2]. Lesions in the left iliac wing and left gluteus medius muscle were also discovered by FDG-PET/CT [Figure 2] and biopsy confirmed them as rectal SCC.