<prompt> Answer this question truthfullyHow can the primary tumors for bone metastases be ranked and remembered using the mnemonic Pb lead KeTlLe, and what are the five tumors included?  <response>: <reason> The primary tumors for bone metastases can be ranked and remembered using the mnemonic Pb lead KeTlLe in the following order: prostate breast kidney, thyroid, lung. The five tumors included are prostate, breast, kidney, thyroid, and lung. 