RET fusion

The Bethesda system provides high diagnostic accuracy for definitive cytological categories in pediatric thyroid nodules. Even indeterminate categories carry elevated malignancy risk, supporting careful surgical consideration and the value of BRAF V600E testing for preoperative risk stratification.

P3, N=120, Active, not recruiting, Shouyao Holdings (Beijing) Co. LTD | Recruiting --> Active, not recruiting

P1, N=240, Not yet recruiting, ScinnoHub Pharmaceutical Co., Ltd.

This nationwide analysis benchmarks how RET-positive findings are surfaced to clinicians across heterogeneous routine CGP implementations in Japan. The data support platform-aware interpretation of RET results in practice, but should not be construed as biologic prevalence estimates or comparative assay performance.

Depending on the Bethesda category, the positive predictive value for malignancy of the seven-gene panel ranged between 18.18% (Bethesda III) and 91.07% (Bethesda V), while the negative predictive value ranged between 93.92% (Bethesda III) and 24.14% (Bethesda V). In conclusion, molecular testing with the seven-gene panel can improve ROM estimation in cytopathologically indeterminate thyroid nodules, but its clinical utility depends on the detected gene alteration.

RET fusions and genetic alteration combination are independent prognostic markers for tumor recurrence of PTC, integrating tumors' genetic status into the 2025 ATA RSS system improves the accuracy of risk stratification for PTC.

P2, N=152, Not yet recruiting, The Third Xiangya Hospital of Central South University

P2, N=32, Not yet recruiting, University of Washington | Initiation date: Jun 2026 --> Sep 2026

This case demonstrates that for selected patients with advanced lung adenocarcinoma harboring a CCDC6-RET fusion and oligometastatic disease, initial systemic therapy with selpercatinib followed by local consolidative surgery is a feasible multimodal strategy. This is not a routine recommendation for stage IV lung cancer but requires individualized decision-making after multidisciplinary discussion in specific oligometastatic cases.

Selpercatinib, a RET inhibitor, is covered by insurance for all solid tumors that are positive for the RET fusion gene...In other solid tumors, positivity is less than 0.5%. However, if positive, treatment is expected to be effective, so it is desirable to actively perform cancer gene panel testing.

The patient did not respond to gemcitabine and cisplatin-based systemic chemotherapy. Selpercatinib, a selective inhibitor of receptor tyrosine kinase RET, blocks RET kinase activity by binding to its adenosine triphosphate-binding site, thus preventing the kinase from phosphorylating substrates and halting oncogenic signaling. The patient was treated with selpercatinib, which produced a durable response lasting over 15 months in this chemotherapy-refractory patient, highlighting the efficacy of selpercatinib in HOOK3-RET fusion-positive pancreatic cancer.

Continuous genomic monitoring is essential for identifying resistance mechanisms and guiding precision therapy. Future studies should explore the impact of different fusion partners on tumor behavior and therapeutic response.