Once the electrode was in place, the contact locations were altered slightly according to where the patient felt the greatest relief from pain. Once the location of maximal relief was determined, the electrode was implanted and secured to the skull. After the primary surgery, a secondary surgery under general anesthesia was conducted. A subcutaneous pulse generator was implanted into a pectoral pocket below the clavicle to stimulate the electrode. It was found that all three patients studied had gained satisfactory pain relief from the deep brain stimulation. Pain had not been completely eliminated, but the intensity had been reduced by over 50% and the burning component had completely vanished. Epidemiology
Phantom limb pain and phantom limb sensations are linked, but must be differentiated from one another. While phantom limb sensations are experienced by those with congenital limb deficiency, spinal cord injury, and amputation, phantom limb pain occurs almost exclusively as a result of amputation. Almost immediately following the amputation of a limb, 90–98% of patients report experiencing a phantom sensation. Nearly 75% of individuals experience the phantom as soon as anesthesia wears off, and the remaining 25% of patients experience phantoms within a few days or weeks. Of those experiencing innocuous sensations, a majority of patients also report distinct painful sensations. Age and gender have not been shown to affect the onset or duration of phantom limb pain.
The majority of respiratory system cancers are attributable to smoking tobacco.The major histological types of respiratory system cancer are:

Small cell lung cancer
Non-small cell lung cancer
Adenocarcinoma of the lung
Squamous cell carcinoma of the lung
Large cell lung carcinoma
Other lung cancers (carcinoid, Kaposi’s sarcoma, melanoma)
Lymphoma
Head and neck cancer
Pleural mesothelioma, almost always caused by exposure to asbestos dust.In addition, since many cancers spread via the bloodstream and the entire cardiac output passes through the lungs, it is common for cancer metastases to occur within the lung. Breast cancer may invade directly through local spread, and through lymph node metastases. After metastasis to the liver, colon cancer frequently metastasizes to the lung. Prostate cancer, germ cell cancer and renal cell carcinoma may also metastasize to the lung. Treatment of respiratory system cancer depends on the type of cancer. Surgical removal of part of a lung (lobectomy, segmentectomy, or wedge resection) or of an entire lung pneumonectomy), along with chemotherapy and radiotherapy, are all used. The chance of surviving lung cancer depends on the cancer stage at the time the cancer is diagnosed, and to some extent on the histology, and is only about 14–17% overall. In the case of metastases to the lung, treatment can occasionally be curative but only in certain, rare circumstances. Benign tumors
Benign tumors are relatively rare causes of respiratory disease. Examples of benign tumors are:

Pulmonary hamartoma
Congenital malformations such as pulmonary sequestration and congenital cystic adenomatoid malformation (CCAM). Pleural cavity diseases
Pleural cavity diseases include pleural mesothelioma which are mentioned above.