Abstract
We report an extremely rare case of metastatic common bile duct cancer from pulmonary adenocarcinoma presenting as obstructive jaundice. The patient was a 76-year-old male, who presented with generalized weakness and right upper quadrant pain. Plain chest X-ray noted multiple small nodules in both lung fields. Abdominal computed tomography scan showed a stricture of the mid common bile duct along with ductal wall enhancement. Endoscopic retrograde cholangiography revealed a concentric, abrupt narrowing of the mid-common bile duct suggestive of primary bile duct cancer. However, pathology comfirmed metastatic common bile duct cancer arising from pulmonary adenocarcinoma with immunohistochemical study with thyroid transcriptional factor-1 (TTF-1).
References
1. Smith HJ. Extrahepatic bile duct obstruction in primary carcinoma of the lung: incidence, diagnosis, and nonoperative treatment. J Natl Med Assoc. 1980; 72:215–220.
2. Moon SG, Han JK, Kim TK, Kim AY, Kim TJ, Choi BI. Biliary obstruction in metastatic disease: thin-section helical CT findings. Abdom Imaging. 2003; 28:45–52.
3. Lee YJ, Kim SH, Lee JY, et al. Differential CT features of intraductal biliary metastasis and double primary intraductal polypoid cholangiocarcinoma in patients with a history of extra-biliary malignancy. AJR Am J Roentgenol. 2009; 193:1061–1069.
4. Guazzi S, Price M, De Felice M, Damante G, Mattei MG, Di Lauro R. Thyroid nuclear factor 1 (TTF-1) contains a homeodomain and displays a novel DNA binding specificity. EMBO J. 1990; 9:3631–3639.
5. Lazzaro D, Price M, de Felice M, Di Lauro R. The transcription factor TTF-1 is expressed at the onset of thyroid and lung morpho-genesis and in restricted regions of the foetal brain. Development. 1991; 113:1093–1104.
6. Bohinski RJ, Huffman JA, Whitsett JA, Lattier DL. Cis-active elements controlling lung cell-specific expression of human pulmonary surfactant protein B gene. J Biol Chem. 1993; 268:11160–11166.
7. Fabbro D, Di Loreto C, Beltrami CA, Belfiore A, Di Lauro R, Damante G. Expression of thyroid-specific transcription factors TTF-1 and PAX-8 in human thyroid neoplasms. Cancer Res. 1994; 54:4744–4749.
8. Fabbro D, Di Loreto C, Stamerra O, Beltrami CA, Lonigro R, Damante G. TTF-1 gene expression in human lung tumours. Eur J Cancer. 1996; 32A:512–517.
9. Folpe AL, Gown AM, Lamps LW, et al. Thyroid transcription factor-1: immunohistochemical evaluation in pulmonary neuroendocrine tumors. Mod Pathol. 1999; 12:5–8.
10. Kaufmann O, Dietel M. Expression of thyroid transcription factor-1 in pulmonary and extrapulmonary small cell carcinomas and other neuroendocrine carcinomas of various primary sites. Histopathology. 2000; 36:415–420.