At what thoracic vertebra level does the esophagus enter the diaphragm?

• A. 10th
• B. 9th
• C. 12th
• D. 8th

Answer: (A)

The esophagus passes through the diaphragm at the level of the 10th thoracic vertebra (T10). This anatomical detail is crucial for understanding various clinical conditions and surgical approaches related to the esophagus and diaphragm.

As the esophagus descends through the thoracic cavity, it travels behind the trachea and the heart, and then it must pass through the diaphragm to reach the stomach in the abdominal cavity. The esophageal hiatus, the opening in the diaphragm through which the esophagus passes, is typically located at this level. This is significant for numerous medical procedures, such as in the management of gastroesophageal reflux disease (GERD) and during surgeries like fundoplication.

The other options do not correspond to the location where the esophagus passes through the diaphragm, which is critical for both anatomical studies and clinical practice. Understanding the correct vertebral level helps healthcare professionals accurately diagnose and treat conditions affecting this region.