Which is a solid tumor often considered weak metabolically?

Mucinous carcinoma is indeed classified as a solid tumor that is often considered weak metabolically. This type of carcinoma can contain large amounts of extracellular mucin, which can hinder the tumor's metabolic activity compared to other tumors. Additionally, mucinous carcinomas typically exhibit lower levels of glucose metabolism, making them less active in PET imaging, which relies on the detection of metabolic activity often indicated by the uptake of radiolabeled glucose analogs like FDG (fluorodeoxyglucose).

In this context, while other tumors may display significant metabolic activity, mucinous carcinoma's structure and composition lead to a reduced metabolic rate, allowing it to be perceived as "weak" in this regard. Understanding the metabolic profile of different tumors is crucial for interpreting PET scans and determining treatment strategies.