The histological diagnosis was performed at the Pathology Unit of the Campus Bio-Medico University Hospital Foundation (Rome, Italy), according to WHO criteria. Clinically relevant molecular predictive markers (EGFR, KRAS, NRAS, BRAF, BRCA1, BRCA2, HRAS, MSI, MMR, c-KIT, PDGFRA, ALK, ROS1, HER2, and PD-L1) were evaluated in-house in 111/184 patient samples, according to a clinical request to establish target therapies (i.e., non-small cell lung cancer (NSCLC), colon cancer, breast cancer, melanoma, etc.) For 73/184 patients, in-house molecular evaluations were not performed, because they were not requested for therapeutic purposes at the time of diagnosis (i.e., cholangiocarcinoma, testicular cancer, hepatocellular carcinoma, etc.).
In-house molecular-marker evaluations included the following predictive markers: EGFR, KRAS, NRAS, BRAF, BRCA1, BRCA2, HRAS, c-KIT, PDGFRA, HER2 (single nucleotide variants (SNVs)), and ALK (SNVs). These were assayed with q-PCR or DNA-based NGS. MSI was assayed with q-PCR. ALK (rearrangements), ROS−1, MET, and RET were assayed with RNA-based NGS or RT-PCR. ALK (rearrangements), ROS-1, and HER2 (amplification) were assayed with FISH. ALK, ROS1, MMR, and PD-L1 were assayed with immunohistochemistry. Different techniques were adopted based on the features of the tumor sample. Histological diagnosis and in-house molecular data were extracted from the clinical reports.
This study was conducted in accordance with the Declaration of Helsinki. The committee of Medical Ethics of the Campus Bio-Medico University Hospital Foundation (Roma, Italy) approved this study. The protocol code is 2015–003385-84.
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