Differential diagnosis of cancer of unknown primary are :
-melanoma
-thyroid
-sarcoma
-adenocarcinoma ( ovarian , breast, pancreatic, hepatobiliary, colon and ovarian )
-germ cell tumour
-prostate cancer
-neuroendocrine tumour
-squamous cell carcinoma ( depending on location, may include anorectal, lung, cervical,head and neck and genital )
-melanoma
-thyroid
-sarcoma
-adenocarcinoma ( ovarian , breast, pancreatic, hepatobiliary, colon and ovarian )
-germ cell tumour
-prostate cancer
-neuroendocrine tumour
-squamous cell carcinoma ( depending on location, may include anorectal, lung, cervical,head and neck and genital )