{
  "abstract": "We report the case of a woman with metastatic alveolar soft part sarcoma (ASPS) who experienced pregnancy-associated disease progression followed by unexpected postpartum regression. Pulmonary lesions increased in size after a miscarriage and during a subsequent pregnancy, prompting consideration for systemic treatment and potential enrolment in a clinical trial evaluating a tyrosine kinase inhibitor in combination with an immune checkpoint inhibitor. However, baseline staging CT performed a few weeks postpartum unexpectedly demonstrated marked spontaneous regression. Because trial enrolment required Response Evaluation Criteria in Solid Tumors-defined radiographic progression, she was deemed ineligible, and no systemic therapy was initiated. Surveillance imaging over the following 2 years confirmed sustained regression and stability of residual disease in the absence of treatment. This case highlights the potential influence of pregnancy-to-postpartum physiology on tumour behaviour through hormonal, immune and angiogenic mechanisms. It also emphasises the importance of short-interval reassessment after delivery before initiation of systemic therapy in reproductive-age patients with metastatic ASPS.",
  "authors": [
    {
      "affiliations": [
        "Division of Hematology and Oncology, Department of Internal Medicine, Mayo Clinic, Phoenix, Arizona, USA"
      ],
      "name": "Angel Luis Orosco-Ttamina"
    },
    {
      "affiliations": [
        "Sarcoma Unit, The Royal Marsden NHS Foundation Trust and The Institute of Cancer Research, London, UK"
      ],
      "name": "Robin Jones"
    },
    {
      "affiliations": [
        "Division of Hematology and Oncology, Department of Internal Medicine, Mayo Clinic, Phoenix, Arizona, USA"
      ],
      "name": "Mahesh Seetharam"
    }
  ],
  "title": "Pregnancy-associated progression with spontaneous postpartum regression in metastatic alveolar soft part sarcoma",
  "uid": "922698fc-b455-52c2-aecd-938a22ed621f"
}