PMC6698278_01
Preoperative findings.. (A) Computed tomography reveals a low density mass in the pancreatic tail (allow).. (B) Positron emission tomography shows a hypermetabolic mass in the pancreatic tail.
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Two years after radiation therapy, the patient's carcinoembryonic antigen (CEA) level was elevated at 13.5 U/mL, and computed tomography (CT) revealed a low-density mass, which measured 20 mm in diameter, in the pancreatic tail (Fig. 1A). Positron emission tomography (PET)/CT revealed a hypermetabolic mass in the pancreatic tail, with no other distant metastases (Fig. 1B).
Resected specimen.. (A, B) A 25 x 25-mm tumor was located in the pancreatic tail.. (C) Histological findings of the lung tumor showing adenocarcinoma.. (D) Histological findings of the pancreatic tumor showing adenocarcinoma.. (E) The pancreatic tumor was TTF-1 positive, like that of the resected primary lung cancer.
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The resected specimen from the pancreatic tail was a 25 x 25-mm tumor (Fig. 2A, B). The pathological diagnosis was metastatic lung adenocarcinoma (Fig. 2C, D), with immunohistochemical profiles (cytokeratin 7- and thyroid transcription factor 1-positive) similar to those of the resected primary lung cancer (Fig. 2E).