ArticleRespiratory medicine case reports2025
Pulmonary metastasis originating from colonic mucinous adenocarcinoma with a tree-in-bud pattern on computed tomography: A case report.
Article in Respiratory medicine case reports, 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
The tree-in-bud pattern, a chest computed tomography (CT) finding, is occasionally associated with malignant tumors. We report a surgical case of pulmonary metastasis from colonic mucinous adenocarcinoma presenting with a tree-in-bud pattern on chest CT. A 50-year-old man underwent surgery for descending colon cancer, which was histopathologically diagnosed as well-differentiated mucinous adenocarcinoma. During follow-up after adjuvant chemotherapy, chest CT revealed nodules with linear branching patterns in the left lung segments S9 and S10, consistent with a tree-in-bud pattern. Diagnostic thoracoscopic wedge resection of the left S9 was performed to exclude inflammatory disease, confirming metastatic colonic adenocarcinoma. Subsequently, 1 month later, left S10 segmentectomy was conducted. Histopathological examination revealed mucus filling the bronchioles in the affected area. This finding indicates that pulmonary metastases from colonic mucinous adenocarcinomas may present as a tree-in-bud pattern. CT findings of this pattern in patients with a history of colon cancer with extracellular mucus require thorough evaluation.
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