Thyroid Transcription Factor 1 (TTF-1) is present in diencephalon, lung, and thyroid tissues. SensiStain Anti-TTF-1 Antibody may be used for the detection of TTF-1 presence in tissues, and may be used for distinguishing lung adenocarcinoma from germ cell tumors, malignant mesothelioma, and metastatic carcinomas from organs other than the thyroid.