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Help please? I want to know what are illdefined osteolytic lesions in bone metastases?

1 doctor weighed in
Dr. Michael Gabor
Diagnostic Radiology

In brief: Bone mets

Bone metastases can cause focal areas of bone loss or destruction, called "osteolytic".
If they cause a focal bone response of increased density or sclerosis, they are called "osteoblastic". "Ill-defined" means that the borders of the bone met are not clearly visualized, which may imply a faster growing or more aggressive met. Slow growing or indolent lesions tend to develop well defined margin

In brief: Bone mets

Bone metastases can cause focal areas of bone loss or destruction, called "osteolytic".
If they cause a focal bone response of increased density or sclerosis, they are called "osteoblastic". "Ill-defined" means that the borders of the bone met are not clearly visualized, which may imply a faster growing or more aggressive met. Slow growing or indolent lesions tend to develop well defined margin
Dr. Michael Gabor
Dr. Michael Gabor
Thank