{
  "abstract": "Background: Primary pulmonary choriocarcinoma (PPC) is an exceptionally rare and highly aggressive extragonadal trophoblastic malignancy in males, with no established standard treatment. Cytotoxic chemotherapy alone generally yields limited therapeutic benefit, while the role of immune checkpoint inhibitors (ICIs) remains poorly defined.\n\nCase presentation: Here, we report a 41-year-old man who presented with a six-month history of cough and was found to have a large right upper lobe pulmonary mass with multiple brain metastases. Histopathological examination revealed typical trophoblastic differentiation, and immunohistochemistry demonstrated diffuse positivity for HCG, CK7, GATA3, and SALL4, whereas TTF-1 and Napsin A were negative. Serum β-human chorionic gonadotropin (β-HCG) was markedly elevated (> 10, 000 mIU/mL), and no gonadal primary lesion was identified, confirming the diagnosis of primary pulmonary choriocarcinoma.\n\nIntervention/outcome: The patient underwent multimodal treatment including radiotherapy, EMA/CO chemotherapy, EMA/EP combined with sintilimab, and third-line therapy consisting of nab-paclitaxel, bevacizumab, and penpulimab. Despite intensive treatment, the disease progressed rapidly with new intracranial and systemic metastases. Throughout the disease course, serial β-HCG measurements closely paralleled radiographic findings and provided timely guidance for therapeutic decision-making. In addition, we reviewed previously reported metastatic male PPC cases and performed an exploratory survival analysis, which suggested that patients receiving ICI-based therapy tended to have longer overall survival than those treated without immunotherapy.\n\nConclusion: Although these findings should be interpreted cautiously because of the limited sample size, this case highlights the highly aggressive nature of male PPC, emphasizes the diagnostic and monitoring value of dynamic β-HCG assessment, and supports further investigation of chemoimmunotherapy as a potential treatment strategy for this rare malignancy.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Clinical Laboratory, Linyi Central Hospital",
    "Department of Gastroenterology, Linyi Central Hospital",
    "Department of Respiratory and Critical Care Medicine, Shandong Medical and Pharmaceutical University Hospital, Shandong Medical and Pharmaceutical University"
  ],
  "article_type": "case report",
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Zhipeng Yin"
    },
    {
      "affs": [
        0
      ],
      "name": "Ying Xiao"
    },
    {
      "affs": [
        1
      ],
      "name": "Dong Zhang"
    },
    {
      "affs": [
        2
      ],
      "name": "Bo Liu"
    },
    {
      "affs": [
        0
      ],
      "name": "Shufang Liu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6m02hgjwy97qd.bib",
  "cited_by": 0,
  "doi": "10.3389/fonc.2026.1945521",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13727472/?tool=EBI",
  "id": "6m02hgjwy97qd",
  "issns": [
    "2234-943X"
  ],
  "landing_url": "https://www.frontiersin.org/articles/10.3389/fonc.2026.1945521/full",
  "language": "eng",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Case Report"
    ],
    [
      "openalex",
      "2739|Gestational Trophoblastic Disease Studies"
    ]
  ],
  "openalex": "W7223046537",
  "pdf_url": "https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2026.1945521/pdf",
  "pmcid": "PMC13727472",
  "pmid": "42978663",
  "published": "2026-10-20",
  "publisher": "Frontiers Media SA",
  "ris": "https://research.draconitic.com/paper/6m02hgjwy97qd.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:13Z",
      "native_id": "10.3389/fonc.2026.1945521",
      "source": "crossref",
      "url": "https://www.frontiersin.org/articles/10.3389/fonc.2026.1945521/full"
    },
    {
      "first_seen": "2026-11-04T15:20:46Z",
      "native_id": "PMC:PMC13727472",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13727472"
    },
    {
      "first_seen": "2026-11-06T12:23:20Z",
      "native_id": "PMC13727472",
      "source": "pmc",
      "url": "https://doi.org/10.3389/fonc.2026.1945521"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2739|Gestational Trophoblastic Disease Studies",
      "subfield": "epidemiology-public-health"
    }
  ],
  "title": "Primary pulmonary choriocarcinoma with brain metastases in a male: a case report and literature review",
  "title_text": "Primary pulmonary choriocarcinoma with brain metastases in a male: a case report and literature review",
  "type": "peer-reviewed",
  "updated_at": "2026-11-07T12:20:39Z",
  "url": "https://research.draconitic.com/paper/6m02hgjwy97qd",
  "venue": "Frontiers in Oncology",
  "versions": []
}