CT of secondary neoplasms unusual structural features—A pictorial essay

CT of Metastases

“…3) [23]. Similarly, regressive phenomena, such as cystic or mucoid degeneration, dystrophic calcification, and hemorrhage, are all primarily related to the histology of the primary tumor ( Fig.…”

“…I) [23] . For example, differentiation toward secretion with a significant extracellular component or the presence of specific cells, such as adipocytes or osteoblasts, has an obvious effect on the attenuation values of the lesion (Fig.…”

“…9) [23,24]. Above a critical volume, particularly in those tumors exhibiting a high mitotic index, evolution toward necrosis is frequent, most often centrally, where hypoxia is more likely (Fig.…”

“…It may indeed affect not only the structural appearance (highly cellular tumors appear hyperdense at CT, Fig. 6) [23,25]. 5) [24] .…”

“…6) [23,25]. The majority of hepatic metastases are however hypodense due to their relative hypovascularity in comparison to the surrounding hepatic parenchyma [23]. 3.…”