HER-2 amplification

Gastric tumors can bypass niche dependence by acquiring KRAS-MAPK-SMAD2/3-driven epithelial WNT secretion. Targeting this axis-through MAPK inhibition, SMAD2/3 blockade, or suppression of WNT secretion-may represent a therapeutic vulnerability in gastric cancer and other KRAS-high malignancies.

Classical EPC typically demonstrates favourable prognosis and is managed as ductal carcinoma in situ. In our study, none of the AEPC patients developed recurrence or metastasis, regardless of adjuvant therapy administration. Although AEPC exhibits a triple-negative immunophenotype, it differs biologically from conventional triple-negative breast cancer (TNBC). The indolent behaviour of AEPC aligns more closely with classical EPC rather than TNBC. Therefore, it may be more appropriate to treat AEPC patients using the same strategies applied to classical EPC.

Patients with advanced AC formed the "Descriptive cohort," while those treated with cisplatin-gemcitabine (CisGem) comprised the "CisGem-treated cohort." Among 534 trial participants, 28 (5.24%) had AC, and 17 received CisGem. Molecular profiling has revealed potentially actionable alterations, including HER2 amplification and KRAS mutations, supporting precision oncology approaches. This study provides the most comprehensive reference dataset to date for advanced AC treated with CisGem and emphasizes the importance of international collaboration and molecularly guided research to improve outcomes in this rare malignancy.

Across these variants, integration of morphology with targeted immunohistochemistry and molecular testing (including p53, MMR status, POLE) is essential for accurate classification, risk stratification. HER2 overexpression and/or amplification occurs in 25-30% and HER2 testing has become a standard biomarker for selecting patients with recurrent or advanced disease for trastuzumab, and more recently trastuzumab-deruxtecan therapy.

P3, N=474, Completed, Istituto Oncologico Veneto IRCCS | Active, not recruiting --> Completed

Similarly, while clinical factors and imaging tools may help identify early on patients at higher risk of experiencing TIC, no cardioprotective strategy has yet demonstrated robust and conclusive benefit. Despite the emergence of newer anti-HER2 agents and evolving treatment paradigms, trastuzumab will probably continue to serve as a key therapeutic backbone, especially for patients with lower risk HER2+ eBC.

Therapies targeting DNA repair pathways, angiogenesis, and androgen receptor signaling-particularly via PARP inhibitors and antibody-drug conjugates like sacituzumab govitecan-have demonstrated clinical benefit...This review delineates recent developments in targeted and immunotherapeutic strategies, emphasizing the role of TILs in shaping treatment response and highlighting combinatorial approaches that synergize molecular targeting with immunomodulation. Through a comprehensive understanding of TNBC's molecular and immune landscape, we propose new therapeutic trajectories to improve clinical outcomes in this challenging malignancy.

Dual HER2-targeted therapy combined with chemotherapy is a promising strategy for HER2-positive mCRC patients with good performance status. This approach warrants validation in large-scale clinical trials to confirm its efficacy.

ERBB2 amp+ mCRC is a small but clinically relevant subgroup with inferior rwPFS across current first-line treatments, highlighting the need for better strategies.

Our study shows that CTCs provide key information that would have been missed by ctDNA monitoring alone and extends CTC and cfDNA genomic profiling to patients with a broad range of CTC counts for blood-based monitoring of HER2 status and other clinically actionable targets for informing treatment decisions in metastatic disease.

Trastuzumab-based therapy has shown survival benefit in HER2-positive SEC, leading to its inclusion in current treatment guidelines...The prognostic value remains debated, though recent trials of antibody-drug conjugates (e.g., T-DXd) show promise...Diagnostic challenges include variable scoring systems, intratumoral heterogeneity, and HER2-low classification. Standardization of testing criteria and further clinical validation of HER2-targeted strategies across gynecologic tumors are essential to guide personalized therapy and improve outcomes.

Hb 100 ng/mL, height >160 cm, and the presence of lymph node metastases were associated with HER2 expression and positivity. HER2 testing should be considered mandatory when all these factors are present. The mechanisms linking these four factors to HER2 expression require further investigation.