Esophageal cancer is a malignancy that arises in the lining of the esophagus — the muscular tube that carries food from the throat to the stomach. It most commonly appears as two main histologic types: squamous cell carcinoma, which develops from the flat cells lining the upper and middle esophagus, and adenocarcinoma, which arises from glandular cells closer to the junction with the stomach. For an overview resource see esophageal cancer.

Typical signs and risk factors

Early disease may be asymptomatic; symptoms usually appear as the tumor grows. Common symptoms include progressive difficulty swallowing (dysphagia), unintentional weight loss, pain when swallowing (odynophagia), and persistent heartburn or chest discomfort. Risk factors differ by type but frequently include:

  • For squamous cell carcinoma: tobacco use, heavy alcohol consumption, and certain dietary or environmental exposures.
  • For adenocarcinoma: chronic gastroesophageal reflux disease (GERD), Barrett's esophagus, obesity, and smoking.

Diagnosis and staging

Diagnosis typically requires upper endoscopy with biopsy to confirm cancer type. Imaging tests such as CT, PET, and endoscopic ultrasound are used to determine the local extent of disease and to identify spread to lymph nodes or distant organs (staging). Accurate staging guides treatment planning and prognosis estimates.

Treatment approaches

Treatment depends on the stage, location, and patient fitness. Options commonly include surgery (esophagectomy) for localized disease, radiation therapy, systemic chemotherapy, and combinations of these modalities. In selected patients, chemoradiation may be used as primary therapy or to shrink tumors before surgery. Advances in targeted therapies and immunotherapy have expanded options for advanced disease, but outcomes vary and are often limited by late diagnosis.

Globally, the pattern of esophageal cancer varies: squamous cell carcinoma remains predominant in many parts of Asia and Africa, whereas adenocarcinoma has been increasing in incidence in Western countries over recent decades. Overall prognosis is guarded because many cases are diagnosed at an advanced stage, highlighting the importance of awareness and early evaluation of persistent swallowing problems or unexplained weight loss.

Prevention strategies focus on reducing modifiable risks: smoking cessation, limiting alcohol, managing reflux and obesity, and surveillance of high-risk conditions such as Barrett's esophagus. Regular medical follow-up and timely investigation of symptoms can improve the chances of earlier detection and more effective treatment.