Fibroblast growth factor receptor 2 translocations in intrahepatic cholangiocarcinoma.
Patients with cholangiocarcinoma often present with locally advanced or metastatic disease. There is a need for effective therapeutic strategies for advanced stage cholangiocarcinoma. Recently, FGFR2 translocations have been identified as a potential target for tyrosine kinase inhibitor therapies. This study evaluated 152 cholangiocarcinomas and 4 intraductal papillary biliary neoplasms of the bile duct for presence of FGFR2 translocations by fluorescence in situ hybridization and characterized the clinicopathologic features of cases with FGFR2 translocations. Thirteen (10 women, 3 men; 8%) of 156 biliary tumors harbored FGFR2 translocations, including 12 intrahepatic cholangiocarcinomas (12/96; 13%) and 1 intraductal papillary neoplasm of the bile duct. Histologically, cholangiocarcinomas with FGFR2 translocations displayed prominent intraductal growth (62%) or anastomosing tubular glands with desmoplasia (38%). Immunohistochemically, the tumors with FGFR2 translocations frequently showed weak and patchy expression of CK19 (77%). Markers of the stem cell phenotype in cholangiocarcinoma, HepPar1 and CK20, were negative in all cases. The median cancer-specific survival for patients whose tumors harbored FGFR2 translocations was 123 months compared to 37 months for cases without FGFR2 translocations (P = .039). This study also assessed 100 cholangiocarcinomas for ERBB2 amplification and ROS1 translocations. Of the cases tested, 3% and 1% were positive for ERBB2 amplification and ROS1 translocation, respectively. These results confirm that FGFR2, ERRB2, and ROS1 alterations are potential therapeutic targets for intrahepatic cholangiocarcinoma.
Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905.
Rondell P
RP
Graham
Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905.
Emily G
EG
Barr Fritcher
Abbott Molecular Diagnostics, Des Plaines, IL 60018.
Ekaterina
E
Pestova
Abbott Molecular Diagnostics, Des Plaines, IL 60018.
John
J
Schulz
Abbott Molecular Diagnostics, Des Plaines, IL 60018.
Leonid A
LA
Sitailo
Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905.
George
G
Vasmatzis
Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905.
Stephen J
SJ
Murphy
Department of Oncology, Mayo Clinic, Rochester, MN 55905.
Robert R
RR
McWilliams
Department of Health Science Research, Mayo Clinic, Rochester, MN 55905.
Steven N
SN
Hart
Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905.
Kevin C
KC
Halling
Division of Gastroenterology, Mayo Clinic, Rochester, MN 55905.
Lewis R
LR
Roberts
Division of Gastroenterology, Mayo Clinic, Rochester, MN 55905.
Gregory J
GJ
Gores
Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905.
Fergus J
FJ
Couch
Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905.
Lizhi
L
Zhang
Division of Hematology and Medical Oncology, Mayo Clinic, Scottsdale, AZ 85259.
Mitesh J
MJ
Borad
Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905. Electronic address: Kipp.Benjamin@mayo.edu.
Benjamin R
BR
Kipp
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001650:Bile Duct Neoplasms / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D001653:Bile Ducts, Intrahepatic / Q000378:metabolism* / Q000473:pathology; D014408:Biomarkers, Tumor / Q000235:genetics / Q000378:metabolism; D018281:Cholangiocarcinoma / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D005260:Female; D006801:Humans; D053554:Keratin-20 / Q000235:genetics / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011505:Protein-Tyrosine Kinases / Q000235:genetics / Q000378:metabolism; D011518:Proto-Oncogene Proteins / Q000235:genetics / Q000378:metabolism; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000235:genetics / Q000378:metabolism; D051497:Receptor, Fibroblast Growth Factor, Type 2 / Q000235:genetics* / Q000378:metabolism; D015996:Survival Rate; D014178:Translocation, Genetic
D014408:Biomarkers, Tumor; D053554:Keratin-20; D011505:Protein-Tyrosine Kinases; D011518:Proto-Oncogene Proteins; D018719:Erb-b2 Receptor Tyrosine Kinases; D051497:Receptor, Fibroblast Growth Factor, Type 2; C507499:KRT20 protein, human; C508053:ERBB2 protein, human; C062333:ROS1 protein, human
Bile; ERBB2; FGFR2; HER2; ROS1; Targeted therapy; Tyrosine kinase