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Background <p>Prostate-specific membrane antigen-direct radioligand therapy (PSMA RLT) is primarily used to treat castration-resistant metastatic prostate cancer (PCa) after prior treatment options have been exhausted. Occasionally, other tumor entities, such as parotid carcinoma in this case, also express prostate-specific membrane antigen (PSMA) on their cell surface.</p> Case description <p>We present the case of a white 67-year-old patient newly diagnosed with locally advanced PCa despite multiple cycles of Lutetium-177-labeled prostate-specific membrane antigen radioligand therapy ([177Lu]Lu-PSMA-RLT), which he had received for metastatic parotid carcinoma. Interestingly, no regressive histopathological changes were found in the prostate biopsy specimen, despite given PSMA-expression in the prostate.</p> Conclusion <p>The potential selection of high-grade disease, which appears to have occurred in this patient, underscores the need for further large-scale histopathological examination and thorough follow-up of the current investigational approaches using [177Lu]Lu-PSMA-RLT in high-risk prostate cancer (PCa).</p>

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Newly diagnosed high-risk localized prostate cancer after multiple [177Lu]Lu-PSMA radioligand therapy in the context of metastatic parotid carcinoma: a case report

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月6日

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  • Christopher Orf,
  • Analena Elisa Handke,
  • Joachim Noldus,
  • Florian Roghmann,
  • Martina Dellino,
  • Karl H. Tully

摘要

Background

Prostate-specific membrane antigen-direct radioligand therapy (PSMA RLT) is primarily used to treat castration-resistant metastatic prostate cancer (PCa) after prior treatment options have been exhausted. Occasionally, other tumor entities, such as parotid carcinoma in this case, also express prostate-specific membrane antigen (PSMA) on their cell surface.

Case description

We present the case of a white 67-year-old patient newly diagnosed with locally advanced PCa despite multiple cycles of Lutetium-177-labeled prostate-specific membrane antigen radioligand therapy ([177Lu]Lu-PSMA-RLT), which he had received for metastatic parotid carcinoma. Interestingly, no regressive histopathological changes were found in the prostate biopsy specimen, despite given PSMA-expression in the prostate.

Conclusion

The potential selection of high-grade disease, which appears to have occurred in this patient, underscores the need for further large-scale histopathological examination and thorough follow-up of the current investigational approaches using [177Lu]Lu-PSMA-RLT in high-risk prostate cancer (PCa).