TY - JOUR T1 - Lynch syndrome-associated lung cancer: pitfalls of an immunotherapy-based treatment strategy in an unusual tumor type A1 - Maccaroni, Elena A1 - Lenci, Edoardo A1 - Agostinelli, Veronica A1 - Cognigni, Valeria A1 - Mazzanti, Paola A1 - Di, Marzia A1 - Paolo, Pietro A1 - Bianchi, Francesca A1 - Belvederesi, Laura A1 - Pagliaretta, Silvia A1 - Mandolesi, Alessandra A1 - Murrone, Alberto A1 - Morgese, Francesca A1 - Ballatore, Zelmira A1 - Berardi, Rossana Y1 - 2021/// KW - Lynch syndrome KW - immunotherapy KW - non-small cell lung cancer KW - microsatellite instability-high KW - pembrolizumab JF - Exploration of Targeted Anti-tumor Therapy VL - 2 SP - 240 EP - 248 DO - 10.37349/etat.2021.00044 UR - https://www.explorationpub.com/Journals/etat/Article/100244 N2 - Lynch syndrome is a hereditary cancer predisposition syndrome caused by germline alterations in mismatch repair (MMR) genes leading to increased risk of colon cancer as well as other cancer types. Non-small cell lung cancer (NSCLC) is not among typical Lynch syndrome-associated tumors: pembrolizumab, an immune checkpoint inhibitor, is actually approved for the treatment of NSCLC patients and represents a promising treatment option for patients with advanced metastatic MMR-deficient cancer, regardless of tumor origin. This case report describes the clinical presentation and management of a 74-year-old female with a history of rectal adenocarcinoma and ovarian cancer, who has a documented frameshift pathogenic variant in the exon 8 of MSH6 gene and an intronic variant in the BRCA2 gene (classified as a variant of uncertain significance), affected by NSCLC with brain metastases. Despite these premises, the patient was treated with pembrolizumab and she did not benefit from this kind of treatment. ER -