What is a possible cause of Annette's ascites fluid accumulation?

Portal hypertension is a condition where there is increased pressure in the portal venous system, often due to liver diseases such as cirrhosis or liver cancer. This elevated pressure can lead to fluid accumulation in the abdominal cavity, resulting in ascites. When the pressure builds, it forces fluid out of the blood vessels into the surrounding tissues, including the peritoneal cavity.

This mechanism is vital in understanding ascites because it points to a systemic issue related to blood flow and liver function rather than direct fluid balance or dietary factors. Other causes like excessive hydration usually do not lead to the localized and significant fluid accumulation seen in ascites, and while gallbladder obstruction and decreased appetite can contribute to abdominal discomfort and other symptoms, they are not directly linked to the physiological process responsible for ascites development.