Mesothelioma Cell Types

There are three different types of mesothelioma cell types. Cell type can influence the aggressiveness of the cancer, treatment protocols, life expectancy, and more.


  • Common Location: Lungs
  • Frequency: 65-75% of cases
  • Average Life Expectancy: 18-24 months

Epithelioid is the most common cell type found in mesothelioma patients. The epithelioid cells are uniform in shape. When viewed under a high magnification microscope the epithelioid cells appear have a uniform and elongated pattern. The uniform pattern makes these cells easier to distinguish from other cancer cells. Epithelioid cell type is the slowest spreading of the three mesothelioma cell types and typically has the most favorable prognosis.


  • Frequency: 15-20% of cases
  • Common Location: Lungs, Abdominal Cavity
  • Average Life Expectancy: 4-6 months

Sarcomatoid mesothelioma is a much less common cell type than epithelioid. While most sarcomatoids will be found in the lungs it is also associated with the peritoneal (abdominal) mesothelioma. These cells are spindle-shaped and arranged in a chaotic fashion. Sarcomatoid is the most aggressive form of mesothelioma. It originates in the muscles and bones and will often metastasize – making it the most difficult mesothelioma form to treat.


  • Frequency: 25%-35%
  • Common Location: Lungs, Abdominal Cavity
  • Average Life Expectancy: 10-15 Months

Biphasic Mesothelioma cells are a mixture between epithelioid and sarcomatoid. Generally the epithelioid and the sarcomatoid cells are grouped together in different parts of the tumor. Aggressiveness of the malignant cells and the life expectancy largely depend on the amount of epithelioid cells versus sarcomatoid cells. The more the epithelioid cells there are compared to sarcomatoid cells the better the prognosis is for the patient.

The Paul Law Firm advocates for victims of asbestos-related diseases. If you or a loved one is suffering from mesothelioma, call the Paul Law Firm. With over 2.5 billion dollars collected for victims of asbestos exposure, we have the knowledge and the experience to fight for you. We also understand that fighting doesn’t just happen in the courtroom. It also happens in a lab where we are fighting for a cure. Check out the Mesothelioma Research Foundation of America here.

Call us today at 1-855 88 LEGAL (885-3425) or contact us online to discuss your case with one of our experienced mesothelioma lawyers