Bone Marrow Metastasis Is an Early Stage of Bone Metastasis in Breast Cancer Detected Clinically by F18-FDG-PET/CT Imaging

Table 2

Number and percentage of BM metastatic lesions and bone metastases (osteolytic/mixed/osteoblastic) in 35 patients noted on pretreatment F18-FDG-PET/CT scans and in 26 patients noted on posttreatment F18-FDG-PET/CT.

	BM; (PET)	Bone metastases; (CT)	Total; (PET/CT)	Patients (number)
PET/CT1; (number of lesions)	420	1353	1773	35
PET/CT1; (% of lesions)	24	76	100	35
PET/CT2; (number of lesions)	49	1185	1234	26
PET/CT2; (% of lesions)	4	96	100	26

BM = bone marrow, PET/CT1 = pretreatment F18-FDG-PET/CT, PET/CT2 = posttreatment F18-FDG-PET/CT, and F18-FDG PET/CT = fluorine-18 fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography.