Question
Which of the following is a primary use of this imaging modality?
| A. |
Staging of esophageal cancer |
| B. |
Evaluation of gastroesophageal reflux disease (GERD) |
| C. |
Identifying the cause of dysphagia |
| D. |
Assessing cardiac and aortic pathology |
|
Correct Answer � A Explanation |
 |
– The image is from Endoscopic Ultrasound (EUS), which combines endoscopy & ultrasound.
– It shows detailed images of the GI tract wall layers and nearby structures.
Primary Use of EUS:
– EUS is highly sensitive for T-staging (tumor depth) & N-staging (lymph nodes) in esophageal, gastric, pancreatic, & rectal cancers.
– It provides layer-by-layer visualization of the esophageal wall.
– This makes it the most accurate tool for local staging of esophageal carcinoma.
Why other options are incorrect:
– B. Evaluation of GERD: GERD is evaluated by pH monitoring, manometry, & upper GI endoscopy, not EUS.
– C. Identifying cause of dysphagia: EUS helps in submucosal/extrinsic causes, but barium swallow, endoscopy, & manometry are first-line.
– D. Assessing cardiac & aortic pathology: Best done by transesophageal echocardiography (TEE) or CT angiography, not EUS.