Adenocarcinoma (Esophageal)

Esophageal adenocarcinoma is a type of cancer that starts in the cells lining the lower part of the esophagus, the tube that carries food from the mouth to the stomach. This cancer mainly affects the digestive system and can cause symptoms like difficulty swallowing, weight loss, and chest pain. It often develops from a condition called Barrett's esophagus, which is caused by long-term acid reflux. The cancer grows by invading nearby tissues and can spread to other parts of the body, making it serious and potentially life-threatening. Early detection is important because symptoms usually appear only after the cancer has advanced.

Esophageal adenocarcinoma is a malignant tumor arising from the glandular epithelium of the distal esophagus, typically developing in the context of chronic gastroesophageal reflux disease (GERD) and Barrett's esophagus. It is characterized by the transformation of normal squamous epithelium into specialized intestinal metaplasia, which predisposes to dysplasia and invasive carcinoma. The pathogenesis involves genetic alterations such as mutations in TP53 and amplification of ERBB2. Clinically, it presents with progressive dysphagia, weight loss, and retrosternal pain. This cancer is significant due to its aggressive nature, poor prognosis, and increasing incidence in Western populations. Diagnosis and staging are critical for guiding treatment and assessing prognosis.