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Background <p>Pulmonary mucinous adenocarcinoma without congenital pulmonary airway malformation (CPAM) is extremely rare in pediatric patients. Here, we report a unique case of minimally invasive mucinous adenocarcinoma without CPAM in a child and provide a comprehensive review of the clinical, radiographic, and histopathological characteristics of the published literature.</p> Case presentation <p>A 9-year-old girl presented with persistent cough and sputum production, raising suspicion of respiratory infection. Chest computed tomography (CT) revealed a solid nodule measuring 1.9&#xa0;cm × 1.6&#xa0;cm in the right lower lobe. Prenatal ultrasonography revealed no congenital lung abnormality. The patient subsequently underwent video-assisted thoracoscopic surgery (VATS) without postoperative complications. Histologically, a focal area demonstrated marked atypical goblet cell hyperplasia in the bronchial epithelium, which abruptly transitioned to mucinous adenocarcinoma, predominantly characterized by a lepidic growth pattern and extensive extracellular mucin accumulation. Pathological examination confirmed pulmonary minimally invasive mucinous adenocarcinoma, staged as pT1miN0M0. Next-generation sequencing (NGS) identified the <i>KRAS G12D</i> mutation. The patient remained well 11 months after resection and did not require additional treatment.</p> Conclusions <p>We demonstrated a novel stepwise progression originating from atypical goblet cell hyperplasia in the bronchial epithelium, rather than from the CPAM, in a pediatric patient. <i>KRAS</i> mutations may play a critical role in the development of pulmonary mucinous adenocarcinoma in pediatric patients.</p>

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A unique case of pulmonary minimally invasive mucinous adenocarcinoma arising from atypical goblet cell hyperplasia in the bronchial epithelium of a 9-year-old girl

  • 期刊论文

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  • 发表日期：

    2025年4月28日

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  • Ping Zhou,
  • Cuomu Zhaxi,
  • Lili Jiang

摘要

Background

Pulmonary mucinous adenocarcinoma without congenital pulmonary airway malformation (CPAM) is extremely rare in pediatric patients. Here, we report a unique case of minimally invasive mucinous adenocarcinoma without CPAM in a child and provide a comprehensive review of the clinical, radiographic, and histopathological characteristics of the published literature.

Case presentation

A 9-year-old girl presented with persistent cough and sputum production, raising suspicion of respiratory infection. Chest computed tomography (CT) revealed a solid nodule measuring 1.9 cm × 1.6 cm in the right lower lobe. Prenatal ultrasonography revealed no congenital lung abnormality. The patient subsequently underwent video-assisted thoracoscopic surgery (VATS) without postoperative complications. Histologically, a focal area demonstrated marked atypical goblet cell hyperplasia in the bronchial epithelium, which abruptly transitioned to mucinous adenocarcinoma, predominantly characterized by a lepidic growth pattern and extensive extracellular mucin accumulation. Pathological examination confirmed pulmonary minimally invasive mucinous adenocarcinoma, staged as pT1miN0M0. Next-generation sequencing (NGS) identified the KRAS G12D mutation. The patient remained well 11 months after resection and did not require additional treatment.

Conclusions

We demonstrated a novel stepwise progression originating from atypical goblet cell hyperplasia in the bronchial epithelium, rather than from the CPAM, in a pediatric patient. KRAS mutations may play a critical role in the development of pulmonary mucinous adenocarcinoma in pediatric patients.