Which diagnostic test is typically used to evaluate esophageal carcinoma?

• A. CT scan
• B. EGD
• C. Chest X-ray
• D. Endoscopic ultrasound

Answer: (B)

The evaluation of esophageal carcinoma often starts with an Endoscopic Gastrointestinal Examination (EGD), also known as esophagogastroduodenoscopy. This procedure involves the use of a flexible tube with a camera to visualize the esophagus, stomach, and part of the duodenum. During an EGD, physicians can directly observe any abnormal lesions or tumors in the esophagus and obtain tissue samples (biopsies) if suspicious lesions are seen. This direct visualization and ability to biopsy make EGD the preferred initial diagnostic test for esophageal carcinoma, enabling both diagnosis and staging.

In comparison, while CT scans and endoscopic ultrasounds provide valuable information, they are typically used in conjunction with or after EGD to assess the extent of the disease and evaluate lymph node involvement or distant metastasis. Chest X-rays are generally utilized for broader screening purposes and assessing lung conditions, rather than specifically for diagnosing esophageal carcinoma.