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Your search keyword '"Takizawa, Hajime"' showing total 3 results
Start Over Author "Takizawa, Hajime" Topic computed tomography Publication Year Range Last 10 years
3 results on '"Takizawa, Hajime"'

1. Multiple huge 'cluster' and 'galaxy' signs on chest radiography in a patient with pulmonary tuberculosis

Author

Oda, Miku, Saraya, Takeshi, Shirai, Tatsuya, Ishikawa, Narishige, Fujiwara, Masachika, and Takizawa, Hajime

Subjects
cluster sign, Chest radiography, Case Report, computed tomography, galaxy sign, Case Reports, pulmonary tuberculosis
Abstract

A 62‐year‐old healthy man presented to our hospital due to a persistent fever of up to 38°C for one week. Thoracic computed tomography showed right pleural effusion with multiple large nodules up to 7 cm in diameter composed of numerous discrete small nodules like fireworks, the so‐called “cluster” signs. Some of the large nodules had a hyper‐dense portion centrally surrounded by partially discrete small nodules, not as densely assembled, suggestive of the “galaxy” sign. The repeated acid‐fast sputum smears and both bronchial washings were all negative for Mycobacterium tuberculosis, but the acid‐fast culture of sputum taken soon after the first bronchoscopy, and pleural fluid, turned out to be positive for M. tuberculosis at six weeks after admission. The present case clearly demonstrates that the “galaxy” and “cluster” signs are red herring signs of the low rates of isolating M. tuberculosis, which should be differentiated from pulmonary sarcoidosis.

Published
2019

2. A Simple Method for Differentiating Complicated Parapneumonic Effusion/Empyema from Parapneumonic Effusion Using the Split Pleura Sign and the Amount of Pleural Effusion on Thoracic CT.

Author

Tsujimoto, Naoki, Saraya, Takeshi, Light, Richard W., Tsukahara, Yayoi, Koide, Takashi, Kurai, Daisuke, Ishii, Haruyuki, Kimura, Hirokazu, Goto, Hajime, and Takizawa, Hajime

Subjects
PNEUMONIA, THORACIC arteries, COMPUTED tomography, EMPYEMA, CELL differentiation, PATIENTS, SURGERY
Abstract

Background: Pleural separation, the “split pleura” sign, has been reported in patients with empyema. However, the diagnostic yield of the split pleura sign for complicated parapneumonic effusion (CPPE)/empyema and its utility for differentiating CPPE/empyema from parapneumonic effusion (PPE) remains unclear. This differentiation is important because CPPE/empyema patients need thoracic drainage. In this regard, the aim of this study was to develop a simple method to distinguish CPPE/empyema from PPE using computed tomography (CT) focusing on the split pleura sign, fluid attenuation values (HU: Hounsfield units), and amount of fluid collection measured on thoracic CT prior to diagnostic thoracentesis. Methods: A total of 83 consecutive patients who underwent chest CT and were diagnosed with CPPE (n=18)/empyema (n=18) or PPE (n=47) based on the diagnostic thoracentesis were retrospectively analyzed. Results: On univariate analysis, the split pleura sign (odds ratio (OR), 12.1; p<0.001), total amount of pleural effusion (≥30 mm) (OR, 6.13; p<0.001), HU value≥10 (OR, 5.94; p=0.001), and the presence of septum (OR, 6.43; p=0.018), atelectasis (OR, 6.83; p=0.002), or air (OR, 9.90; p=0.002) in pleural fluid were significantly higher in the CPPE/empyema group than in the PPE group. On multivariate analysis, only the split pleura sign (hazard ratio (HR), 6.70; 95% confidence interval (CI), 1.91-23.5; p=0.003) and total amount of pleural effusion (≥30 mm) on thoracic CT (HR, 7.48; 95%CI, 1.76-31.8; p=0.006) were risk factors for empyema. Sensitivity, specificity, positive predictive value, and negative predictive value of the presence of both split pleura sign and total amount of pleural effusion (≥30 mm) on thoracic CT for CPPE/empyema were 79.4%, 80.9%, 75%, and 84.4%, respectively, with an area under the curve of 0.801 on receiver operating characteristic curve analysis. Conclusion: This study showed a high diagnostic yield of the split pleura sign and total amount of pleural fluid (≥30 mm) on thoracic CT that is useful and simple for discriminating between CPPE/empyema and PPE prior to diagnostic thoracentesis. [ABSTRACT FROM AUTHOR]

Published
2015
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