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Purpose <p>Salivary gland carcinomas (SGC) are rare, heterogenous malignancies with limited treatment options in recurrent or metastatic (r/m) disease. We investigated the impact of immunohistochemical and molecular markers on treatment choice and patient outcomes.</p> Methods <p>We retrospectively investigated clinical, pathological and molecular characteristics of 51 patients (pts) with r/m SGC treated at the University Hospital Zurich between 2010 and 2024. Immunohistochemical and molecular profiles were evaluated in respect to treatment selection, response and survival.</p> Results <p>Salivary duct carcinoma (SDC) and adenoid-cystic carcinoma (AdCC) were the most common subtypes. In the SDC group, in 15/20 pts personalized first-line treatment based on immunohistochemical or molecular findings resulted in higher response rates and longer duration of response compared to chemotherapy. In 20 pts of the AdCC group, no actionable alterations were identified. Yet, pts in this group demonstrated the longest overall survival despite low response rates. Among 11 pts with other subtypes, one pt with secretory carcinoma and <i>ETV6::NTRK3</i> fusion experienced a sustained response to larotrectinib. HER2 IHC2 + expression without gene amplification was observed in 15 pts. Two pts responded to trastuzumab deruxtecan (TDxd) after progression on first line therapy.</p> Conclusions <p>The impact of immunohistochemical or molecular markers on treatment selection and response was most pronounced in SDC. HER2 IHC2 + expression was observed across multiple subtypes, indicating that TDxd may represent a potential treatment option for more pts than previously anticipated. The impact of comprehensive genomic profiling on targeted treatment options is currently still modest.</p>

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Metastatic and recurrent salivary gland carcinoma: clinical characteristics and comprehensive molecular profiling at a tertiary care center

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月27日

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  • Tamara Rordorf,
  • Panagiotis Balermpas,
  • Tomas Brezina,
  • Martina A. Broglie,
  • Sandra N. Freiberger,
  • Kristian Ikenberg,
  • Anja Lorch,
  • Gregoire B. Morand,
  • Simon A. Mueller,
  • Martin Zoche,
  • Joerg Beyer,
  • Niels J. Rupp

摘要

Purpose

Salivary gland carcinomas (SGC) are rare, heterogenous malignancies with limited treatment options in recurrent or metastatic (r/m) disease. We investigated the impact of immunohistochemical and molecular markers on treatment choice and patient outcomes.

Methods

We retrospectively investigated clinical, pathological and molecular characteristics of 51 patients (pts) with r/m SGC treated at the University Hospital Zurich between 2010 and 2024. Immunohistochemical and molecular profiles were evaluated in respect to treatment selection, response and survival.

Results

Salivary duct carcinoma (SDC) and adenoid-cystic carcinoma (AdCC) were the most common subtypes. In the SDC group, in 15/20 pts personalized first-line treatment based on immunohistochemical or molecular findings resulted in higher response rates and longer duration of response compared to chemotherapy. In 20 pts of the AdCC group, no actionable alterations were identified. Yet, pts in this group demonstrated the longest overall survival despite low response rates. Among 11 pts with other subtypes, one pt with secretory carcinoma and ETV6::NTRK3 fusion experienced a sustained response to larotrectinib. HER2 IHC2 + expression without gene amplification was observed in 15 pts. Two pts responded to trastuzumab deruxtecan (TDxd) after progression on first line therapy.

Conclusions

The impact of immunohistochemical or molecular markers on treatment selection and response was most pronounced in SDC. HER2 IHC2 + expression was observed across multiple subtypes, indicating that TDxd may represent a potential treatment option for more pts than previously anticipated. The impact of comprehensive genomic profiling on targeted treatment options is currently still modest.