Clin Surg | Volume 5, Issue 1 | Research Article | Open Access

Annual Trend of Metastatic Lung Tumors in Japan

Hiroyuki Miura1* and Jun Miura2

1Department of Thoracic Surgery, Akiru Municipal Medical Center, Japan
2Department of Surgery, Kyorin University School of Medicine, Japan

*Correspondance to: Hiroyuki Miura 

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Objectives: The Japanese Association for Thoracic Surgery conducts annual thoracic and cardiovascular surgery surveys. We analyzed the data of patients who underwent surgery for metastatic lung tumors to characterize annual trends. Methods: This retrospective study analyzed the distribution of primary sites, mortality rates, and surgical methods in patients with resected metastatic lung tumors registered by the Japanese Association for Thoracic and Cardiovascular Surgery between 1996 and 2013. Results: The number of resections for metastatic lung tumors increased annually from 2118 in 1996 to 7829 in 2013. The proportion of thoracoscopic surgeries increased from 22.7% in 1996 to 79.6% in 2013. Following the implementation of tracking for hospital mortality rates in 1997, the 30-day and hospital mortality rates were 0.2% and 0.3% and 0.1% and 0.2% in 1997 and 2013, respectively. The primary sites of resected metastatic lung tumors in 1996 were colorectum, kidney, breasts, lungs, bones, soft tissue, ear/nose/throat, uterus, testes, and ovaries in 46.8%, 8.0%, 6.9%, 5.6%, 5.3%, 4.5%, 4.0%, 2.7%, 1.8% and 0.5%, respectively. The proportions of metastases from the breasts, bones, soft tissue, and testicles decreased by at least 0.9% and those of metastases from the colorectum, ear/ nose/throat, hepatobiliary system, pancreas, and uterus increased by 1% or more from 1996 to 2013. Conclusion: Although the number of resection surgeries for metastatic lung tumors increased markedly, the mortality rates remained acceptable. Although surgery is necessary for patients with a definite diagnosis of metastatic disease, whether th


Metastatic lung tumor; Mortality rate; Thoracic surgery; Video assisted thoracic surgery


Miura H, Miura J. Annual Trend of Metastatic Lung Tumors in Japan. Clin Surg. 2020; 5: 2740..

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