Comprehensive Overview of Lung Cancer Types and Progression Phases
This detailed guide explains the primary types of lung cancer, including non-small cell and small cell varieties, along with the progression stages from early to advanced disease. Understanding these classifications can aid in early detection and effective treatment planning.
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Understanding Lung Cancer: Types and Progression Stages
Lung cancer develops when abnormal cells in the lungs grow uncontrollably, damaging surrounding tissues. These abnormal cells can form a mass or tumor as the disease advances. The two primary categories of lung cancer are Non-small cell lung cancer and small cell lung cancer.
Types of Lung Cancer
Non-small cell lung cancer
This is the most prevalent type, comprising about 80-85% of cases.
Small cell lung cancer
Also called oat cell cancer, it accounts for 10-15% of lung cancer diagnoses.
Stages and Severity
The progression of lung cancer is classified based on tumor size, location, and spread extent.
Stage 0
Also known as carcinoma in situ, this initial phase features tiny tumors confined within the lung, without tissue infiltration.
Stage 1
Tumors are up to 4cm and localized, with no spread to lymph nodes or other organs. Early detection here offers high curability.
Stage 2
Tumor size varies, and cancer may have spread to nearby lymph nodes or adjacent lung tissue and organs.
Stage 3
Tumors of any size, with potential lymph node involvement, often extend within the lung and surrounding areas.
Stage 4
This advanced phase involves tumors that may have invaded distant organs, such as the liver, bones, or brain, with significant lymph node involvement or spread to the opposite lung or pleura.
