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S. Song
Author of
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P2.01 - Advanced NSCLC (ID 618)
- Event: WCLC 2017
- Type: Poster Session with Presenters Present
- Track: Advanced NSCLC
- Presentations: 1
- Moderators:
- Coordinates: 10/17/2017, 09:00 - 16:00, Exhibit Hall (Hall B + C)
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P2.01-069 - Radiologists' Considerations to Determine the Origin of Tumor on Chest CT: Lung vs Mediastinum (ID 9352)
09:00 - 09:00 | Author(s): S. Song
- Abstract
Background:
In daily practice of chest radiology, radiologists encounter various cases of tumor involving both mediastinum and lung parenchyme, and often undergo difficulty determining the origin of tumor. We retrospectively collected 10 cases of tumor and the determinants of 15 radiologists’ decisions to inquire about the origin of tumor. There have been certain agreeable findings for the right expectations. Through the review of published articles, we re-estimated the findings that may be the factors providing appropriate diagnostic approach to the origin of tumor involving lung and mediastinum.
Method:
We retrospectively collected 16 cases of tumors involving the lung parenchyme and mediastinum. After excluding tumors with posterior mediastinum involvement, benign histology, and no histopathological confirmation, 10 cases were evaluated by 15 radiologists (6 residency trainees and 9 specialists in chest radiology). The inquiries included the expected origin of tumor and the determinants for the expectation. Then the review of collected determinants for each case was performed by 2 specialists in chest radiology (5 year and 22 years of experience in radiology) and the certain agreeable findings for the right expectations were analyzed.
Result:
Among the 10 cases of tumor, 8 cases were lung cancer (3 small cell lung cancer, 3 adenocarcinomas, 2 squamous cell carcinoma) and 2 cases were thymic carcinoma. The largest percentage of correct expectations was 87 % (9/9 of chest specialists and 4/6 residents) and the smallest percentage was 13 % (1/9 of chest specialist and 1/6 residents). For lung cancer, the determinants for the right expectation included open bronchus sign, involvement of middle mediastinum, and mediolateral displacement of mediastinum. On the other hand, findings such as epicenter of mass, irregular margin, angle of the mass with mediastinal contour, and pleural metastasis were not contributable.
Conclusion:
Findings helped to make the right expectations were open bronchus sign, involvement of middle mediastinum, and mediolateral displacement of mediastinum. Understanding the CT findings of tumor mass involving mediastinum and lung may be helpful to diagnosis.
