What is the difference between lung adenocarcinoma and lung squamous cell carcinoma?

Lung adenocarcinoma and squamous cell carcinoma are different in cause, location and symptoms.

1. Different causes of

lung adenocarcinoma are not directly related to smoking in most cases, but long-term smoking or exposure to tobacco smoke can increase the risk of lung adenocarcinoma. In addition, exposure to second-hand smoke, air pollutants, radiation, etc. may also be associated with lung adenocarcinoma. Lung squamous cell carcinoma is usually associated with long-term smoking, and smoking is the main pathogenic factor.

2. Different locations of

lung adenocarcinoma often occur in the periphery of lung tissue, including alveoli and bronchial endings. Lung squamous cell carcinoma usually originates from epithelial cells of the upper airway and can appear in the central bronchus.

3. Symptoms of

lung adenocarcinoma may not be obvious in the early stage, but as the tumor grows, chest pain, shortness of breath, weight loss, fatigue and other discomfort symptoms may occur. Lung squamous cell carcinoma often leads to respiratory symptoms, such as cough, expectoration, hoarseness and other symptoms.