Tumor heterogeneity represents a possible cause of error in detecting predictive genetic alterations on tumor tissue and can be overcome by testing alterations in circulating tumor DNA (ctDNA) using liquid biopsy. We assessed 72 consecutive patients with a diagnosis of metastatic colorectal cancer (mCRC) using Idylla™ Biocartis, a fully automated platform that evaluates the most frequent mutations of KRAS, NRAS and BRAF genes. We correlated the results of liquid biopsy and standard tissue-based next generation sequencing (NGS) analyses to patient clinical features. The overall agreement was 81.94%. Concordance was 85.71% and 96.15% in treatment-naïve patients and in the patient subgroup with liver metastases, respectively. In liver metastases positive, treatment-naïve patients, sensitivity, specificity and positive predictive value (PPV) were 92.31%, 100% and 100%, respectively. Circulating mutational fraction (CMF) was significantly higher in patients with liver metastases and high carcinoembryonic antigen (CEA) levels. In a subgroup of patients pre-treated with anti-Epidermal Growth Factor Receptor (EGFR) agents, emerging KRAS mutations were evidenced in 33% of cases. Testing RAS/BRAF mutations on plasma using the Idylla™ Biocartis platform is feasible and reliable in mCRC patients in clinical practice.

Cutaneous melanoma is a lethal disease, even when diagnosed in advanced stages. Although recent progress in biology and treatment has dramatically improved survival rates, new therapeutic approaches are still needed. Deregulation of epigenetics, which mainly controls DNA methylation status and chromatin remodeling, is implied not only in cancer initiation and progression, but also in resistance to antitumor drugs. Epigenetics in melanoma has been studied recently in both melanoma preclinical models and patient samples, highlighting its potential role in different phases of melanomagenesis, as well as in resistance to approved drugs such as immune checkpoint inhibitors and MAPK inhibitors. This review summarizes what is currently known about epigenetics in melanoma and dwells on the recognized and potential new targets for testing epigenetic drugs, alone or together with other agents, in advanced melanoma patients.

The management of oligometastatic colorectal cancer (OMD-CRC) has undergone a profound evolution, transforming what was once a uniformly fatal diagnosis into a clinical scenario in which long-term survival and even cure are attainable for a carefully selected subset of patients. This review provides a comprehensive synthesis of integrated, multidisciplinary strategies for OMD-CRC, with particular emphasis on hepatic and pulmonary metastases. We examine the biological foundations that differentiate oligometastatic from polymetastatic disease, including molecular subtypes that inform prognosis and therapeutic responsiveness. Local treatment modalities are critically evaluated, ranging from surgical metastasectomy—the standard of care in adequately selected patients—to minimally invasive approaches such as thermal ablation and Stereotactic Body Radiotherapy (SBRT). Recent randomized trials and prospective studies have suggested possible non-inferiority of these alternatives to surgery in selected contexts, thereby broadening the spectrum of curative-intent interventions. Equally pivotal is the integration of systemic therapy. We discuss optimal timing (neoadjuvant, adjuvant, perioperative) and regimen selection for both resectable and initially unresectable disease. The role of conversion therapy, combining intensive chemotherapy with targeted agents guided by molecular determinants such as RAS/BRAF mutational status and tumor sidedness, is highlighted as a cornerstone in expanding surgical eligibility. Looking ahead, emerging technologies—including radiomics and liquid biopsy approaches such as circulating tumor DNA (ctDNA)—hold promise for refining patient selection, detecting minimal residual disease, and further individualizing treatment pathways. The convergence of advanced local therapies, precision-guided systemic regimens, and novel biomarkers delineates the new frontier in optimizing outcomes for patients with OMD-CRC.