Adenocarcinoma of lung is commonest cancer of lung. Sufferings of this dreaded disease are mainly due to bony metastasis in the form of pain and pathological fractures. Unfortunately  all the treatment option available for this malignancy are not proved useful . Present  patient  was a case of  Adenocarcinoma of lung with complaint of cough since 10 months and swelling over left forearm since 2 months . On investigation found to have lung carcinoma with metastasis to right lobe of thyroid , radius of left forearm and skull and also having malignant pleural effusion. He was treated with palliative treatment including radiation and chemotherapy. After extensive search in literature it was found that only three cases were of thyroid metastasis from lung adenocarcinoma reported. All had metastatic disease .as disease was systemic and widespread hence obviously with bad prognosis.  Our aim behind reporting this case is that as it is fourth case of thyroid metastasis from lung adenocarcinoma hence it is worth reportable and it suggest need of more extensive research to invent new effective anti-cancer drugs to decrease sufferings of these unfortunate patients. As this is advanced case of lung cancer there is no role of surgery. Palliative treatment including chemotherapy and radiotherapy seems to be not effective, hence it suggest need of more extensive research to invent new effective anti cancer drugs to decrease sufferings of these unfortunate patients.