Key result
FDG-PET, CT, and MRI successfully characterized the separate components of a small cell lung cancer metastasis and benign adrenal adenoma collision tumor, which was confirmed pathologically.
Case Report (n=1)
FDG-PET, CT, and MRI can effectively characterize the separate components of adrenal collision tumors preoperatively.
May aid preoperative planning in rare adrenal collision tumors; leaves open need for prospective validation beyond case reports.
OBJECTIVE: We report a case of an adrenal collision tumor composed of a small cell lung carcinoma metastasis and a benign adrenal adenoma identified preoperatively on FDG-PET, CT and MRI and confirmed pathologically. METHODS: The patient's history, preoperative imaging characteristics, postoperative course, and histopathology are described. A review of the literature addressing adrenal collision tumors is provided. RESULTS: A 47-year-old female was found to have a left upper lobe lung mass and an adrenal lesion on imaging. FDG-PET, CT and MRI of the adrenal suggested a metastatic lesion adjacent to an adrenal adenoma. CT-guided biopsy of the adrenal gland was consistent with a small cell lung cancer metastasis. The patient underwent systemic chemotherapy and had complete resolution of the left upper lobe mass. Post-treatment FDG-PET demonstrated a persistently enlarged adrenal gland with decreased but persistent FDG uptake. The patient underwent adrenalectomy and pathologic examination demonstrated a small cell lung cancer/adenoma collision tumor. CONCLUSIONS: This case and a review of the literature demonstrate that FDG, CT and MR imaging can all characterize the separate components of collision tumors within the adrenal gland.
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Untch et al. (2014) conducted a case report in Small cell lung cancer metastasis/adrenal adenoma collision tumor (n=1). Adrenalectomy and chemotherapy was evaluated on Pathologic confirmation of collision tumor components. FDG-PET, CT, and MRI successfully characterized the separate components of a small cell lung cancer metastasis and benign adrenal adenoma collision tumor, which was confirmed pathologically.
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