The pain in the back of the chest corresponding to the pain in the back may be due to conduction caused by intercostal neuralgia and appear as pain in the back. There is also a possibility that there is a tumor in the posterior back that invades the intercostal nerve and causes pain in the posterior back. In this case, a CT scan of the chest should be performed to see if there is any intercostal nerve invasion in the painful area, if there is any bone destruction in the spine, and if there is any intervertebral disc compression on the nerve that causes pain. For example, if the lung tumor invades the posterior chest wall and causes pain, and there is no distant metastasis, surgery should be performed.