Types of Mesothelioma Flashcards

Which type of mesothelioma affects the lining of the heart?

Answer: Pericardial mesothelioma

Pericardial mesothelioma develops in the pericardium, the thin membrane surrounding the heart, and accounts for roughly 1% of all cases.

What cell type in epithelioid mesothelioma is responsible for its relatively better prognosis compared to other cell types?

Answer: Well-defined epithelial cells that respond better to therapy

Epithelioid cells are more uniform and cohesive, making them more responsive to chemotherapy and resulting in longer median survival.

A Navy veteran develops mesothelioma in the abdominal cavity after asbestos exposure aboard a ship. Which type does he most likely have?

Answer: Peritoneal mesothelioma

Peritoneal mesothelioma forms in the peritoneum lining the abdominal cavity and is the second most common type after pleural.

Which mesothelioma cell type has the worst prognosis and is characterized by spindle-shaped cells?

Answer: Sarcomatoid

Sarcomatoid mesothelioma is the most aggressive cell type, with spindle-shaped cells that are highly resistant to standard treatments.

Testicular mesothelioma originates in which structure?

Answer: The tunica vaginalis surrounding the testes

Testicular mesothelioma arises in the tunica vaginalis, the mesothelial lining that surrounds the testes, making it the rarest form.

In biphasic mesothelioma, what determines whether prognosis leans closer to epithelioid or sarcomatoid outcomes?

Answer: The ratio of epithelioid to sarcomatoid cells present

When epithelioid cells predominate in biphasic mesothelioma, prognosis is better; a higher proportion of sarcomatoid cells worsens outcomes.

Which type of mesothelioma is most commonly diagnosed in Navy veterans who worked in ship engine rooms?

Answer: Pleural mesothelioma

Pleural mesothelioma accounts for about 80% of all cases and is the most prevalent type in Navy veterans due to asbestos inhalation in enclosed ship spaces.