The symptoms associated with peritoneal mesothelioma are located basically in the stomach. The pain is one of the most common symptoms; one study found that 33 percent of patients suffers from abdominal pain during the time of diagnosis. During this study it was also demonstrated that the accumulation of fluid in the abdomen was the second most common symptom, reported by 31 percent of patients. A 5 percent reported aches and pains and accumulation of fluid in the abdomen.
A small percentage of cases (about 15 percent of the population in the study) reported that a hernia may lead to the diagnosis of peritoneal mesothelioma.
Ascites (the formation of pleural effusions in the abdomen) is another common symptom, during the time of diagnosis and in the final stages of the disease. With the ascites, the accumulation of fluid in the abdominal cavity can cause pain due to the pressure applied. Almost three-quarters of patients suffering from ascites at some stage of their disease.
Other symptoms are a little less common include:
Constipation or diarrhea
Constant abdominal pressure