Unlikely Cohabitants: A Collision Tumor of Metastatic Small Cell Lung Carcinoma and Adrenal Adenoma

This case report is the second known publication of a very specific collision tumor, where small cell lung cancer metastasized to an adrenal adenoma. The focus is primarily on multimodal radiologic findings of the developing neoplasm, including CT, MRI, and FDG PET/CT. These findings are compared with established diagnostic criteria for adrenal adenomas and metastases, as identified by the literature and content expert review. Epidemiological data regarding collision tumors is discussed, as well as proposed treatment strategies. Similar topics are elucidated for small cell lung carcinoma. Reporting of this collision tumor adds to the relatively thin body of knowledge of these unique oncologic phenomena; allowing for potential future advancements in both diagnosis and management.