Surgical Cases of Solitary Lesion after Surgery for Primary Lung Cancer Hiroe Aoshima 1 , Hiroaki Shidei 1 , Shouta Mitsuboshi 1 , Hideyuki Maeda 1 , Takako Matsumoto 1 , Tamami Isaka 1 , Masato Kanzaki 1 1Department of Thoracic Surgery, Tokyo Women’s Medical University Keyword: lung cancer , solitary lesion , nontuberculous mycobacteriosis , pulmonary cryptococcosis pp.331-335
Published Date 2021/5/1
DOI https://doi.org/10.15106/j_kyobu74_331
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Lung nodules during postoperative follow-up of lung cancer are generally suspected to be its recurrence, but some cases are diagnosed as non-malignant disease. From January 2001 to November 2018, we experienced 5 (4.5%) new non-malignant lesions in 112 lung cancer patients who underwent a lung resection. The average period from first to second lung surgery was 36.2 months (range:3-64), and computed tomography findings before the second surgery were solid nodules in four cases and ground-glass opacity in one case. The average maximum standardized uptake value of the lesions on fluorodeoxyglucose positron emission tomography was 4.29 (range:0-10.85). The diagnosis after the second surgery was pulmonary cryptococcosis in 2 cases, nontuberculous mycobacteriosis in 1 case, inflammatory mass in 1 case, and pneumonia in 1 case. The differential diagnosis between these diseases and lung cancer recurrence is discussed in the present study.

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