Table 1.
Number of bone metastases identified on imaging (per patient, n = 55).
Table 2.
Number of bone metastases identified on imaging (per lesion, n = 135).
Table 3.
Distribution on a per-patient basis of different types of rib metastases in lung cancer, comparing 5 mm slice thickness and 1 mm slice thickness.
Table 4.
Distribution on a per-lesion basis of different types of rib metastases in lung cancer, comparing 5 mm slice thickness and 1 mm slice thickness.
Figure 1.
The imaging manifestations of rib metastases in lung cancer, comparing 5 mm and 1 mm slice thickness on CT, and MRI.
A, B. Two consecutive 5 mm levels of CT images showing a rib metastasis (black arrow); CT depicted predominantly osteolytic and expansive changes, osteoblastic changes were not obvious. C, D, E. Thickness of 1 mm interception of three discontinuous CT dimensions showing typical mixed changes, osteoblastic changes (black arrow), and osteolytic changes (white arrow). F. T1WI shows an area of isometric and low-mixed signal intensity; the area that showed osteoblastic changes on CT reveals low signal intensity on T1WI (white arrow). G. The lesion enhances heterogeneously on Gd-DTPA enhanced T1WI imaging (black arrow). H. T2WI (FS) shows high, slightly high, isometric and low-mixed signal intensity (black arrow).
Figure 2.
Minimal osteolytic changes: the initial manifestations of bone metastases and the primary stage of osteoblastic metastases.
A. CT image showing a rib metastasis on the left, presenting as an intramedullary small patchy hyperdensity and a peripheral hypodense spot (black arrow). B. The lesion appears as an intramedullary area of slightly high signal on T2WI (FS) (white arrow).
Figure 3.
MRI in the detection and extent of osteoblastic metastatic lesions through direct and indirect signs.
A. CT image showing an osteoblastic metastatic lesion of a right rib, presenting as an intramedullary homogeneously high density (white arrow). B. T1WI showing an area of low signal intensity (black arrow). C. The lesion enhances slightly and heterogeneously on Gd-DTPA enhanced T1WI imaging with peripheral edema (black arrow). D. T2WI (FS) showed intramedullary areas of high, slightly high, isometric and low-mixed signal intensity with peripheral edema (white arrow).