Case 30
Images by courtesy of Dr.Wanzhen Zeng University of Ottawa
Presentation:
A 52-year-old gentleman presented for colonoscopy due to a family history of colon polyps. Biopsies of a submucosal rectal lesion suggested a neuroendocrine tumor.
1.What is the radiotracer used to perform this whole-body scan? This is a Ga68 (DOTATATE) PET scan. The patient underwent surgery, then Ga68 DOTATATE PET scan was performed for staging.
Now review the trans-axial images:
Fused transaxial- Lung window
Fused transaxial- Soft tissue window
CT
Description and opinion: There is mild focal uptake in the left upper lung lobe with a maximum SUV of 3.4, without corresponding findings on low-dose CT and a diagnosis chest CT which was performed 2 weeks prior to this study. The finding could be due to iatrogenic microembolization, with no clinical significance, which could be followed in subsequent imaging studies. Otherwise, normal distribution of DOTATATE is seen with no abnormal DOTATATE uptake in the liver, spleen, pancreas, and adrenal glands. No increased uptake at the rectum.