Two Cases of Pulmonary Tumorlet Complicated by Primary Lung Cancer

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  • 原発性肺癌を合併した肺tumorletの2例

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Abstract

<p>Background. A pulmonary tumorlet is a rare tumor-like lesion, recognized as hyperplasia of neuroendocrine cells. Most tumorlets are incidentally found in resected lung specimens with chronic respiratory diseases. The association of pulmonary tumorlets with primary lung carcinoma is extremely rare. Cases. Case 1: Computed tomography (CT) showed a 50-mm tumor in the right lower lobe and swelling of the ipsilateral hilar lymph node. The tumor was diagnosed as non-small cell carcinoma by a bronchoscopic biopsy, and then the right lower lobe was resected. The histological diagnosis based on the surgical specimen was adenocarcinoma with some squamous cell carcinoma. A tumorlet was found near the carcinoma tissue. Case 2: CT showed a 40×30-mm mass in S5 of the right middle lobe with a 3-mm nodular shadow. The right middle lobe was resected, and a histopathological examination revealed adenocarcinoma and a tumorlet 3×1.5 mm in size near the carcinoma tissue. Conclusion. Although it is important to differentiate lung tumorlets from malignant tumors, the number of reports is small because of their rarity. We experienced two cases of pulmonary tumorlets complicated by primary lung cancer.</p>

Journal

  • Haigan

    Haigan 61 (7), 959-963, 2021-12-20

    The Japan Lung Cancer Society

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