title: Letter to the Editor regarding the paper by Park et al., Extra-gain of HER2-positive cases through HER2 reassessment in primary and metastatic sites in advanced gastric cancer with initially HER2-negative primary tumours: Results of GASTric cancer HER2 reassessment study 1 (GASTHER1).
authors.affiliation: Department of Human Pathology in Adult and Developmental Age "Gaetano Barresi", Unit of Pathological Anatomy, University of Messina, AOU Policlinico G. Martino, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Ieni
authors.affiliation: Department of Medical and Surgical Sciences and Advanced Technologies, G.F. Ingrassia, "Policlinico Vittorio Emanuele", Anatomic Pathology Section, University of Catania, Catania, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Angelico
authors.affiliation: Department of Pathology, Hospital San Giovanni di Dio e Ruggi d'Aragona of Salerno, Salerno, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Zeppa
authors.affiliation: Department of Human Pathology in Adult and Developmental Age "Gaetano Barresi", Unit of Pathological Anatomy, University of Messina, AOU Policlinico G. Martino, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Tuccari
mesh_terms: D006801:Humans; D018719:Erb-b2 Receptor Tyrosine Kinases; D013274:Stomach Neoplasms
chemical_list: D018719:Erb-b2 Receptor Tyrosine Kinases