title: Synchronous lung cancers: when same histological types feature different molecular profiles and response phenotypes.
abstract: We discuss the case of synchronous bilateral lung cancers which feature the same histological phenotype and a different EGFR mutational profile. Both histological and molecular characterizations were performed on specimens derived thorough CT-guided fine needle aspiration. A first-line chemotherapy was unsuccessful. Subsequent objective response to the EGFR inhibitor Erlotinib was clearly coherent with the sequencing data and the mutated nodule was effectively reduced (> 50%) after therapy, while the lesion assessed as EGFR wild type featured a slight response. This report has two relevant implications. It points out that in case of multiple malignant lesions at time of diagnosis, molecular profiling should be as extensive as possible and it might contribute to clarify the association between the lesions found. Besides the molecular analysis on cytology specimens could identify an accurate and safe diagnostic approach for clinical use.
authors: Department of Hematological, Pneumological and Cardiovascular Sciences - Section of Pneumology, University and Fondazione IRCCS Policlinico San Matteo 27100 Pavia, Italy.
authors: Giulia M
authors: GM
authors: Stella
authors: Francesca
authors: F
authors: Cemmi
authors: Simona
authors: S
authors: Inghilleri
authors: Michele
authors: M
authors: Zorzetto
authors: Maurizio
authors: M
authors: Luisetti
authors: Ernesto
authors: E
authors: Pozzi