Stages of Mesothelioma Development

There are two systems in use that chart the development of Mesothelioma.

The first is the Butchart system which is based on the size of the tumor; the second system is known as the TNM System which takes into consideration the size of the tumor, the spread and also if the lymph node has been affected.

Butchart System

Stage 1: There is Mesothelioma present in the right or left lung. It may also involve the diaphragm on the same side.

Stage 2: Mesothelioma has spread into the chest wall, esophagus, heart or both lungs.

Stage 3: Stage 3 of Mesothelioma is reached when the Mesothelioma has spread to the abdominal cavity.

Stage 4: Stage 4 is the final stage of mesothelioma. This is when the cancer has spread to other organs.

TNM System

Stage 1: The Mesothelioma involves either the left or right lung and potentially the pericardium and diaphragm on the same side.

Stage 2: When the Mesothelioma has spread from the left or right lung to the lymph node on the same side.

Stage 3: Stage 3 is when the Mesothelioma has spread to the chest wall, muscle, ribs, esophagus, heart or other organs on the same side.

Stage 4: Stage 4 is reached when the Mesothelioma has spread to the lymph nodes in the chest on the opposite side to the original tumor. At this stage, it may also have spread to the opposite lung, organs in the abdominal cavity or neck.