ArticleDiscover oncology2025
Misdiagnosis of bilateral breast metastases as primary benign tumors secondary to lung large-cell neuroendocrine carcinoma: a case report.
Article in Discover oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundBreast metastases from pulmonary large-cell neuroendocrine carcinoma (LCNEC) often mimic benign tumors, making diagnosis challenging due to their rarity. CASE PRESENTATION: A 49-year-old female presented with bilateral breast masses noticed during self-examination for three weeks. Given the benign appearance of the lesions, same-day en bloc resection was planned without preoperative biopsy. Consequently, the patient underwent bilateral mastectomy and axillary surgery based on intraoperative frozen section results, which suggested a possible primary high-grade invasive breast cancer, but no metastatic workup was performed beforehand. Postoperatively, she was diagnosed with LCNEC, with bilateral breast and multiple systemic metastases, leading to an unnecessary surgery.
conclusionsThorough preoperative evaluation is essential for unusual breast tumors to differentiate between primary and secondary lesions. Maybe pulmonary neuroendocrine carcinoma in the lower lobe more commonly metastasizes to the breast through hematogenous spread, while upper lobe lesions typically spread via lymphatic routes.
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