Endobronchial Hamartoma with Proliferation to the Lung Parenchyma: a Case Report

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  • Kubota Koji
    Department of Respiratory Medicine, Nanpuh Hospital Department of Pulmonary Medicine, Graduate School of Medical & Dental Sciences, Kagoshima University
  • Mizuno Keiko
    Department of Pulmonary Medicine, Graduate School of Medical & Dental Sciences, Kagoshima University
  • Yagi Tomoko
    Department of Respiratory Medicine, Nanpuh Hospital Department of Pulmonary Medicine, Graduate School of Medical & Dental Sciences, Kagoshima University
  • Fukuda Kousei
    Department of Respiratory Medicine, Nanpuh Hospital Department of Pulmonary Medicine, Graduate School of Medical & Dental Sciences, Kagoshima University
  • Takeda Aya
    Department of General Thoracic Surgery, Graduate School of Medical & Dental Sciences, Kagoshima University
  • Inoue Hiromasa
    Department of Pulmonary Medicine, Graduate School of Medical & Dental Sciences, Kagoshima University

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Other Title
  • 肺実質への進展が確認された気管支内腔型肺過誤腫の1例

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<p>Background. Pulmonary hamartoma is the most common benign lung tumor type. Most such cases are parenchymal hamartoma, while some are endobronchial hamartoma. Case. A 40-year-old man presenting with obstructive pneumonia was admitted to our hospital. An endobronchial tumor in the left lower lobar bronchus was observed on chest computed tomography. A bronchoscopic examination revealed a smooth-surfaced polypoid tumor occluding the left lower lobar bronchus. A transbronchial biopsy revealed no diagnostic findings, so bronchoscopic resection using electrosurgical snaring was performed. Accordingly, a histopathological analysis led to the diagnosis of endobronchial cartilaginous hamartoma. Since a tumor obstructing the orifice of the left B6c had persisted, video-assisted left S6 segmentectomy was performed for radical surgery. The postoperative pathological findings revealed that some parts of the endobronchial tumor had expanded to the pulmonary parenchyma. Conclusion. We herein report a case of pulmonary hamartoma that was confirmed to have expanded to the pulmonary parenchyma after bronchoscopic resection for an endobronchial tumor. In some cases of endobronchial hamartoma, expansion to the pulmonary parenchyma occurs, and caution must be exercised in its treatment.</p>

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