Globally,carcinoma of lung is the predominant cause of cancer death among both men and women.While hematogenous spread from primary lung cancer to multiple other organs is frequently reported,metastases of malignant tumors to diaphragm and spleen are rare.Nowadays,Positron emission tomography(PET)with 18 F-fluorodeoxyglucose(FDG)has emerged in such a way that it has become an effective imaging technology for the evaluation of different carcinomas,particularly for cancer staging and follow up after therapy.PET scan is able to provide metabolic information.In this case,we present an attractive unified PET/CT scan image in a patient with lung carcinoma having unusual diaphragm and splenic metastases.So,PET/CT imaging could strongly identified rare and unusual metastatic sites of cancer and added more appropriate staging in patient with carcinoma of lung.