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Case Reports: Rare disease
PD-1 Inhibition in metastatic high tumour mutational burden (TMB) leiomyosarcoma with clinicopathological correlates
  1. Divita Pandita1,
  2. Mrugakshi Dave1 and
  3. Brian Schulte2
  1. 1Department of Hematology-Oncology, University of California San Francisco, San Francisco, California, USA
  2. 2Department of Medicine, University of California San Francisco, San Francisco, California, USA
  1. Correspondence to Divita Pandita; divita.pandita{at}jhu.edu

Abstract

Leiomyosarcoma (LMS) is a subtype of sarcoma derived from smooth muscle cells. Unfortunately, this malignancy has a high rate of metastatic disease. Palliative systemic therapy has historically relied on cytotoxic agents such as doxorubicin, which have low rates of response. Immunotherapy has not been shown to be effective for most patients with sarcoma, including those with LMS. However, this has not been well described for patients with LMS and high tumour mutational burden (TMB). Herein, we report the case of a woman in her late 50s with metastatic high TMB (>10) leiomyosarcoma treated with pembrolizumab.

  • Immunology
  • Gynecological cancer
  • Cancer intervention

https://doi.org/10.1136/bcr-2023-256697

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    Footnotes

    • Contributors The following authors were responsible for drafting of the text, sourcing and editing of clinical images, investigation results, drawing original diagrams and algorithms and critical revision for important intellectual content: MD, DP and BS. The following authors gave final approval of the manuscript: MD, DP and BS.

    • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

    • Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

    • Competing interests None declared.

    • Provenance and peer review Not commissioned; externally peer reviewed.