What condition is characterized by an increase in abdominal girth due to fluid accumulation?

The condition characterized by an increase in abdominal girth due to fluid accumulation is ascites. Ascites refers specifically to the accumulation of fluid in the abdominal cavity, which can result from various health issues, including liver disease, heart failure, or certain cancers.

In ascites, the fluid buildup occurs in the peritoneal cavity, leading to distension and increased girth of the abdomen. This condition can also cause discomfort, difficulty breathing due to pressure on the diaphragm, and other complications if not managed properly.

While other conditions listed also have associated symptoms, they do not primarily lead to fluid accumulation in the abdominal cavity that would significantly increase abdominal girth in the same way. For example, portal hypertension may contribute to the development of ascites as a secondary effect, and chronic kidney disease can lead to fluid overload, but it does not exclusively cause abdominal distension as a defining symptom. Cholecystitis, which involves inflammation of the gallbladder, can cause abdominal pain but is not primarily associated with fluid accumulation that leads to increased abdominal girth.