Philipp Jurmeister1, Dido Lenze1, Erika Berg1, Stefanie Mende1, Frank Schäper2, Udo Kellner3, Hermann Herbst4, Christine Sers1, Jan Budczies1, Manfred Dietel1, Michael Hummel1, Maximilian von Laffert5. 1. Institute of Pathology, Campus Charité Mitte, Charité Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany. 2. Pathology-Berlin, Bioptisches Institut Gemeinschaftspraxis für Pathologie, Lindenberger Weg 27, 13125 Berlin, Germany. 3. Institute of Pathology, Johannes Wesling Klinikum Minden, Hans-Nolte-Straße 1, 32429 Minden, Germany. 4. Institute of Pathology, Vivantes Klinikum Berlin, Oranienburger Straße 285, 13437 Berlin, Germany. 5. Institute of Pathology, Campus Charité Mitte, Charité Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany. Electronic address: maximilian.von-laffert@charite.de.
Abstract
OBJECTIVES: ALK, MET and ROS1 are prognostic and predictive markers in NSCLC, which need to be implemented in daily routine. To evaluate different detection approaches and scoring systems for optimal stratification of patients eligible for mutation testing in the future, we screened a large and unselected cohort of NSCLCs for all three alterations. MATERIAL AND METHODS: Using tissue microarrays, 473 surgically resected NSCLCs were tested for ALK and MET expression by IHC and genomic alterations in the ALK, MET and ROS1 gene by FISH. For MET IHC, two different criteria (MetMAb and H-score), for MET FISH, three different scoring systems (UCCC, Cappuzzo, PathVysion) were investigated. RESULTS: ALK and ROS1 positivity was seen in 2.6% and 1.3% of all ADCs, respectively, but not in pure SCCs. One ROS1 translocated tumor showed additional ROS1 amplification. MET IHC+/FISH+ cases were found in both histological subtypes (8.6% in all NSCLCs; 10.6% in ADCs; 5.0% in SCCs) and were associated with pleural invasion, lymphatic vessel invasion and lymph node metastasis. MET altered ADCs more frequently showed a papillary growth pattern. Whereas ALK testing revealed homogenous results in IHC and FISH, we saw discordant results for MET in about 10% of cases. Both METIHC scoring systems revealed almost identical results. We did not encounter any combined FISH positivity for ALK, MET or ROS1. However, three ALK positive cases harbored MET overexpression. CONCLUSION: In daily routine, IHC could support FISH in the identification of ALK altered NSCLCs. Further research is needed to assess the role of discordant MET results by means of IHC and FISH as well as the relevance of tumors with an increased ROS1 gene copy number.
OBJECTIVES: ALK, MET and ROS1 are prognostic and predictive markers in NSCLC, which need to be implemented in daily routine. To evaluate different detection approaches and scoring systems for optimal stratification of patients eligible for mutation testing in the future, we screened a large and unselected cohort of NSCLCs for all three alterations. MATERIAL AND METHODS: Using tissue microarrays, 473 surgically resected NSCLCs were tested for ALK and MET expression by IHC and genomic alterations in the ALK, MET and ROS1 gene by FISH. For MET IHC, two different criteria (MetMAb and H-score), for MET FISH, three different scoring systems (UCCC, Cappuzzo, PathVysion) were investigated. RESULTS: ALK and ROS1 positivity was seen in 2.6% and 1.3% of all ADCs, respectively, but not in pure SCCs. One ROS1 translocated tumor showed additional ROS1 amplification. MET IHC+/FISH+ cases were found in both histological subtypes (8.6% in all NSCLCs; 10.6% in ADCs; 5.0% in SCCs) and were associated with pleural invasion, lymphatic vessel invasion and lymph node metastasis. MET altered ADCs more frequently showed a papillary growth pattern. Whereas ALK testing revealed homogenous results in IHC and FISH, we saw discordant results for MET in about 10% of cases. Both METIHC scoring systems revealed almost identical results. We did not encounter any combined FISH positivity for ALK, MET or ROS1. However, three ALK positive cases harbored MET overexpression. CONCLUSION: In daily routine, IHC could support FISH in the identification of ALK altered NSCLCs. Further research is needed to assess the role of discordant MET results by means of IHC and FISH as well as the relevance of tumors with an increased ROS1 gene copy number.
Authors: M Dietel; K Jöhrens; M V Laffert; M Hummel; H Bläker; B M Pfitzner; A Lehmann; C Denkert; S Darb-Esfahani; D Lenze; F L Heppner; A Koch; C Sers; F Klauschen; I Anagnostopoulos Journal: Cancer Gene Ther Date: 2015-09-11 Impact factor: 5.987
Authors: Verona E Bergshoeff; Maschenka C A Balkenhol; Annick Haesevoets; Andrea Ruland; Michelene N Chenault; Rik C Nelissen; Carine J Peutz; Ruud Clarijs; Jeroen A W M Van der Laak; Robert P Takes; Michiel W Van den Brekel; Marie-Louise F Van Velthuysen; Frans C S Ramaekers; Bernd Kremer; Ernst-Jan M Speel Journal: Cancers (Basel) Date: 2022-07-03 Impact factor: 6.575
Authors: Till Plönes; Walburga Engel-Riedel; Erich Stoelben; Christina Limmroth; Oliver Schildgen; Verena Schildgen Journal: J Pers Med Date: 2016-01-15
Authors: Johanna S M Mattsson; Hans Brunnström; Verena Jabs; Karolina Edlund; Karin Jirström; Stephanie Mindus; Linnéa la Fleur; Fredrik Pontén; Mats G Karlsson; Christina Karlsson; Hirsh Koyi; Eva Brandén; Johan Botling; Gisela Helenius; Patrick Micke; Maria A Svensson Journal: BMC Cancer Date: 2016-08-05 Impact factor: 4.430