What Is Esophageal Cancer?
A plain-language overview of esophageal cancer, where it starts, and its two most common types, based on National Cancer Institute resources.
Source: National Cancer Institute · NCI reviewed 2025-05-12 · Verified 2026-07-02
The 30-second version
Esophageal cancer is cancer that forms in the tissues of the esophagus, the muscular tube that moves food and liquid from the throat to the stomach. It starts on the inside lining and grows outward. The two most common types are squamous cell carcinoma and adenocarcinoma.
Key takeaways
- Esophageal cancer is cancer that forms in the tissues of the esophagus.
- The esophagus is the muscular tube that moves food and liquid from the throat to the stomach.
- Esophageal cancer starts on the inside lining and grows outward through the other layers.
- The two most common types are squamous cell carcinoma and adenocarcinoma.
- Squamous cell carcinoma is most often found in the upper and middle esophagus; adenocarcinoma usually forms in the lower part, near the stomach.
- The two types are named for the kind of cells that become cancerous and tend to form in different parts of the esophagus.
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The full explanation.
The simple version
Esophageal cancer is a disease in which cancer cells form in the tissues of the esophagus. The esophagus is the hollow, muscular tube that moves food and liquid from the throat to the stomach.
The wall of the esophagus is made up of several layers of tissue, including a mucous membrane, muscle, and connective tissue. Esophageal cancer starts on the inside lining of the esophagus and spreads outward through the other layers as it grows.
In short: esophageal cancer begins on the inside lining of the tube that carries food to the stomach.
The two most common types
The two most common forms of esophageal cancer are named for the type of cells that become cancerous. These two types tend to form in different parts of the esophagus:
- Squamous cell carcinoma. This cancer forms in the thin, flat cells lining the inside of the esophagus. It is most often found in the upper and middle part of the esophagus, but it can occur anywhere along the esophagus. It is also called epidermoid carcinoma.
- Adenocarcinoma. This cancer begins in glandular cells. Glandular cells in the lining of the esophagus produce and release fluids such as mucus. Adenocarcinomas usually form in the lower part of the esophagus, near the stomach.
In short: squamous cell carcinoma usually forms higher up, while adenocarcinoma usually forms lower, near the stomach.
Why the type matters
Knowing the type of esophageal cancer helps describe where it started. Because squamous cell carcinoma and adenocarcinoma tend to form in different parts of the esophagus, doctors pay attention to which type is present.
Everyone's situation is different. Your healthcare team is the best source of information about your own health and any next steps.
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Animated lessons are in production. Here’s the planned video slate for this topic — each one will be based on the same NCI-sourced explanation you’re reading.
What Is Esophageal Cancer: the quick overview
A one-breath explanation you can watch before an appointment.
Coming soonWhat Is Esophageal Cancer, explained simply
The core ideas with friendly animation and plain language.
Coming soonUnderstanding what is esophageal cancer — full lesson
A deeper walkthrough covering the key takeaways and common questions.
Coming soonVideo transcript▾
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Suggested animation storyboard▾
- 1Open on a calm title card: "What Is Esophageal Cancer?" with the Cancer Explained mark.
- 2Narrator reads the 30-second summary while a soft animated diagram builds on screen: "Esophageal cancer is cancer that forms in the tissues of the esophagus, the muscular tube that moves food and liquid from the throat to the stomach. It starts on the inside lining and grows outward. The two most common types are squamous cell carcinoma and adenocarcinoma."
- 3Scene 2: illustrate the idea — "Esophageal cancer is cancer that forms in the tissues of the esophagus."
- 4Scene 3: illustrate the idea — "The esophagus is the muscular tube that moves food and liquid from the throat to the stomach."
- 5Scene 4: illustrate the idea — "Esophageal cancer starts on the inside lining and grows outward through the other layers."
- 6Close on a reminder card: this is educational only; talk with your healthcare team, and a link to the NCI source.
Words to know
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Quick knowledge check
According to this article, what is the esophagus?
Frequently asked questions
▸What is esophageal cancer?
Esophageal cancer is a disease in which cancer (malignant) cells form in the tissues of the esophagus. The esophagus is the hollow, muscular tube that moves food and liquid from the throat to the stomach.
▸How does esophageal cancer grow?
The wall of the esophagus is made up of several layers of tissue, including a mucous membrane, muscle, and connective tissue. Esophageal cancer starts on the inside lining of the esophagus and spreads outward through the other layers as it grows.
▸What are the two most common types of esophageal cancer?
The two most common forms are squamous cell carcinoma and adenocarcinoma. They are named for the type of cells that become cancerous. These two types tend to form in different parts of the esophagus.
▸What is squamous cell carcinoma of the esophagus?
Squamous cell carcinoma is cancer that forms in the thin, flat cells lining the inside of the esophagus. It is most often found in the upper and middle part of the esophagus, but it can occur anywhere along the esophagus. It is also called epidermoid carcinoma.
▸What is adenocarcinoma of the esophagus?
Adenocarcinoma is cancer that begins in glandular cells. Glandular cells in the lining of the esophagus produce and release fluids such as mucus. Adenocarcinomas usually form in the lower part of the esophagus, near the stomach.
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Questions to ask your healthcare team
Consider bringing these questions to your next appointment.
- What type of esophageal cancer do I have?
- Where in my esophagus did the cancer start?
- What tests do I need to learn more about my cancer?
- What do the terms in my results mean?
- Where can I find reliable information and support?
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