What is known is that asbestos fibers get stuck in the pericardial membranes of the heart. Over time, the accumalation of these asbestos fibers cause

There are 3,000 cases of mesothelioma a year and of those cases, 10 to 20% of those cases are mesothelioma of the abdomen called peritoneal mesothelioma. Peritoneal Mesothelioma occurs in the abdomen that effect the mesothelial cells that form the peritoneum. The peritoneum is comprised of two layers that surround, support and protect organs in the abdomen.
Like the other forms of mesothelioma, peritoneal mesothelioma is not complete understood as to how it forms. Many scientist believe that peritoneal mesothelioma is caused by one of two ways. The first theory is that asbestos is ingested and find there way to the digestive organs. The other way is by inhaling the asbestos fibers. The asbestos finds its way to the peritoneal membrane through the lymphatic system.

Regardless of how the asbestos fibers find their way to the abdomen, they can not be expelled. Over time, the peritoneum thickens often resulting in cancerous tumors. Like pericardial mesothelioma (mesothelioma of the heart) or pleural mesothelioma (mesothelioma of the lungs), peritoneal mesothelioma are vague and can often be confused with other non-serious diseases. However, if you or someone you know has been exposed to asbestos in the past 20 to 50 years (or ever), and you experience of the following symptoms, it is advised that you seek the consultation of a doctor. Only tests can determine if mesothelioma is present.

Symptoms of Mesothelioma of the abdomen area include:
Night sweats
Fever
Weight loss that can't be explained
Unexplained diarrhea or constipation
Nausea and/or vomiting
Lumps under the skin on the abdomen
Swelling and/or pain in the abdomen
Anemia
Fatigue