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Case 1. An 82-year-old male patient visited with neck pain and right upper extremity pain 6 months after the onset of symptoms. The pain was aching, and right 4th and 5th fingers were cold and numbness. Past history was gastric cancer surgery and chemotherapy 7 years ago. On MRI, central canal stenosis of C5/6 and C6/7, as well as foramen stenosis, were observed. Radiculopathy caused by a cervical disc was initially diagnosed. trigger point injections, cervical epidural injections were done, but no effect. During follow-up, patient couldn’t dorsiflex the right wrist gradually. Nerve conduction studies found right C7-8-T1 radiculopathy. In the meantime, a mass was accidentally found in the lower lobes of both lungs on the patient's yearly abdominal CT. And additional chest CT showed a 5 cm mass in the apex of the right lung and lymph metastasis. Case 2. A 62-year-old male patient visited our hospital complaining of tingling in right hands. This patient was diagnosed with C6/7 disc herniation. After cervical 7th foraminal nerve root injection, and pulsed RF, symptoms improved by 30-40%. About one year later, new symptoms appeared: numbness and paresthesia in the right medial arm. On physical exam, motor power of the 7th, 8th cervical level was reduced to Grade III/V. Nerve conduction test showed right C7-8-T1 radiculopathy. No MRI findings explained the patient's symptoms. Chest PA and chest CT were performed, and lung cancer with lymph node and pleural metastasis were found in the right lung apex.