This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nuclear medicine, Subject name: Radiology
FDG-PET negative tumor is: 
Select and explain. 
A. Atypical carcinoid, B. Typical carcinoid, C. Small cell carcinoma, D. Large cell neuroendocrine carcinoma
B: Typical carcinoid
Answer: B: Typical carcinoid 
Explanation: * 18 FDG negative tumors - Have low mitotic & low metabolic activity (M-TB) - Mucinous Ca- Typical carcinoids- Bronchoalveolar Ca