What type of cell is found in the esophagus?

Columnar epithelium, characteristic of the rest of the gut, consists of a single layer of tall, rectangular cells. In Barrett's esophagus, the normally squamous epithelium of the lower esophagus becomes replaced with various types of columnar cells, that may predispose to a type of cancer known as adenocarcinoma.
A.

What makes up the esophagus?

The esophagus is a muscular tube connecting the throat (pharynx) with the stomach. The esophagus is about 8 inches long, and is lined by moist pink tissue called mucosa. The esophagus runs behind the windpipe (trachea) and heart, and in front of the spine. They keep food and secretions from going down the windpipe.
  • What passes through the center of the esophagus?

    The esophagus is about 8 inches long, and is lined by moist pink tissue called mucosa. The esophagus runs behind the windpipe (trachea) and heart, and in front of the spine. Just before entering the stomach, the esophagus passes through the diaphragm.
  • What are the secretions of the esophagus?

    The mucosa does contain mucous glands that are expressed as foodstuffs distend the esophagus, allowing mucus to be secreted and aid in lubrication. The body of the esophagus is bounded by physiologic sphincters known as the upper and lower esophageal sphincters.
  • What are the symptoms of cancer of the esophagus?

    Or, the cause of a symptom may be another medical condition that is not cancer.
    • Difficulty and pain with swallowing, particularly when eating meat, bread, or raw vegetables.
    • Pressure or burning in the chest.
    • Indigestion or heartburn.
    • Vomiting.
    • Frequent choking on food.
    • Unexplained weight loss.
    • Coughing or hoarseness.
B.

Is the esophagus made of smooth muscle?

The esophagus wall is composed of striated muscle in the upper part, smooth muscle in the lower part, and a mixture of the two in the middle.
  • What are the four layers of the esophagus?

    The esophageal wall contains four layers:
    • mucosa—surface epithelium, lamina propria, and glands.
    • submucosa—connective tissue, blood vessels, and glands.
    • muscularis (middle layer) upper third, striated muscle.
    • adventitia—connective tissue that merges with connective tissue of surrounding structures.
  • How thick is the wall of the esophagus?

    When the esophagus was dilating, the average esophageal wall thickness was between 1.87 and 2.70 mm. The thickest part was cervical esophagus. Thickness of esophageal wall was larger in males than that of females (5.26 mm vs. 4.34 mm p<0.001).
  • What are the early signs of cancer of the esophagus?

    Signs and symptoms of esophageal cancer include:
    • Difficulty swallowing (dysphagia)
    • Weight loss without trying.
    • Chest pain, pressure or burning.
    • Worsening indigestion or heartburn.
    • Coughing or hoarseness.

Updated: 2nd October 2019

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