<prompt> Most common bone secondaries fromCarcinoma kidneyCarcinoma breastCarcinoma prostrateCarcinoma thyroid  <response>: B Carcinoma breast 1085-CSDT 13thMETASTATIC BONE TUMORS: 80 of these metastatic lesions are from primary carcinoma-particularly of the Breast, Prostate, lung, kidney, thyroid, pancreas or stomach in that order of frequency 1202-CSDT 12th. Most common primary source of solitary skeletal metastasis at the time of first diagnosis is carcinoma of the kidney 1202 CSDT 12,h. Most common site of bony metastasis in carcinoma breast goes to - Lumber vertebra. Most common quadrant site in carcinoma breast is - upper outer quadrant.A MOST COMMON CAUSE OF OSTEOBLASTIC SECONDARY In males - Prostate cancer In females - Breast cancerB MOST COMMON CAUSE OF OSTEOLYTIC METASTASIS In males - Lung cancers In females - Breast cancersC LYTIC EXPANSILE METASTASIS Thyroid Renal carcinoma 