Figure 2From: Imaging and management of a small cell lung cancer metastasis/adrenal adenoma collision tumor: a case report and review of the literatureImmunohistochemistry of resected collision tumor. Nuclear thyroid transcription factor-1 (TTF-1) immunohistochemical staining (left) and cytoplasmic chromogranin staining (right) were positive in the small cell carcinoma component, but not in the adrenal adenoma.Back to article page