👉 Cystectasia is a condition where there are numerous tiny, fluid-filled sacs or collections of fluid in the chest cavity. These collections can form on either side of the heart and are often associated with chest pain, coughing up blood, and discomfort during physical activities like running. This condition arises from the presence of small tubes that connect the lungs to the chest wall. These tubes are called "cysts," which are usually caused by a protein called collagen, but can also be due to