Post-lung transplantation Aspergillus niger infection.
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Adult↗
Biomedical subjects
Katsuo Usuda
Publications and source records attributed to Katsuo Usuda.
Complete port-accessed lobectomy by the muscle-sparing method.
We report the case of a 53-year-old woman who underwent complete port-accessed middle lobectomy by a new technique that preserves all muscles, including the extracostal and intercostal muscles. The operation was performed by using only thoracovideoscopy, and the resected lobe was withdrawn in a pouch through a subxiphoid incision through the substernal route. This complete port-accessed lobectomy is a new technique and is thought to be less invasive than video-assisted lobectomy with minithoracotomy.
Female↗
Computed tomographic image comparison between mediastinal and lung windows provides possible prognostic information in patients with small peripheral lung adenocarcinoma.
OBJECTIVES: The purpose of this study was to determine whether the ratio of the area of the mediastinal computed tomographic image to that of the lung computed tomographic image can be a prognostic factor of small peripheral lung adenocarcinoma. METHODS: We studied the computed tomographic images of 143 patients with primary peripheral lung adenocarcinoma of 30 mm or less in maximum diameter. Two groups were categorized according to the tumor's ratio of the area of the mediastinal computed tomographic image to that of the lung computed tomographic image (tumor's area in the mediastinal computed tomographic image/tumor's area in lung computed tomographic image x 100%), both faint density-type (<50%) and solid-type images (>/=50%). Clinical factors and prognoses of the 2 groups were analyzed. RESULTS: There were 58 patients with the solid-type tumor image and 85 patients with the faint density-type tumor image. The number of patients with tumor size of less than 20 mm in the faint density-type tumor group (n = 30) was significantly higher than that in the solid-type tumor group (n = 8, P =.008). The 5-year survival of patients with faint density-type tumors was 74.1%, whereas that in patients with solid-type tumors was 54.2% (P =.013). Furthermore, the survival curve of patients with the solid-type computed tomographic image combined with ground-glass opacity was similar to that of patients with the faint density-type image. Multivariate analysis revealed the prognostic influence of the ratio of the area of the mediastinal computed tomographic image to that of the lung computed tomographic image on survival (P =.029, relative risk = 0.48) and showed to be of second highest influence after the N factor. CONCLUSIONS: It is suggested that the ratio of the area of the mediastinal computed tomographic image to that of the lung computed tomographic image can be a prognostic factor in patients with small peripheral lung adenocarcinoma.
Adenocarcinoma↗
[Efficacy of lung cancer screening].
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Bias↗
[Lung cancer screening--its efficacy and limitations].
Although the purpose of cancer screening is to decrease the number of cancer deaths, the efficacy of some cancer screening programs has not been proved. This article describes the authorized method for the lung cancer screening system in Japan, and introduces papers reporting the efficacy of lung cancer screening. The problems in the present lung cancer screening system in Japan are also discussed.
Cytodiagnosis↗
The efficacy of sputum cytology in mass screening program for early detection of lung cancer.
BACKGROUND: In order to evaluate the efficacy of sputum cytology in lung cancer screening, we re-analyzed the data obtained in our previous case-control study. MATERIALS AND METHODS: The source population was defined as the previous screenees for reducing self-selection bias. Matching conditions were: gender, year of birth, municipality and smoking history. RESULTS: Smoking adjusted odds ratio (SAOR) of dying from lung cancer for those screened by chest roentgenogram (CXp) only vs. not screened was 0.47, and that for those screened by sputum cytology (SpC) & CXp vs. not screened was 0.36, which was approximately three-fourths of the former. In another analysis, SAOR for those screened by SpC & CXp vs. those screened by CXp only was 0.63. CONCLUSION: Although statistical significance was not obtained, there might be some possibility that the risk of lung cancer death in smokers would decrease by additional SpC, compared with CXp only.
Aged↗