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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Secondaries are common in a/e -
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The correct answer is  Metastasis may occur in any bone but most commonly involve axial skeleton (e.g. vertebra, pelvis, ribs. skull, sternum) Proximal femur, and humerus in descending order.
Red marrow in these areas are rich in capillary network, slow blood flow and nutrient environment facilitates the implantation and growth of the tumour cells.
Metastasis in small bone of hand and feet are uncommon.
Metastatic tumors are the most common form of skeletal malignancy.