MedlinePlus states that a cyst is closed sac that is filled with air, pus, fluid or debris. An abscess is structurally similar to a cyst, but it is the result of an infection and filled with pus.Know More
According to MedlinePlus, cysts develop on any type of body tissue. Sebaceous cysts are the most common and develop right under the skin's surface because of clogged sebaceous glands or items stuck in the skin, such as ingrown hairs. WebMD describes cysts as generally painless unless they become irritated or infected or they rupture. Left alone, many cysts resolve on their own, while others require draining, medication to shrink their size or surgical removal.
MedlinePlus reports that abscesses are also found on most types of tissues. Bacterial, viral and parasitic infections lead to abscesses. WebMD states that these infectious agents enter a tissue through pores, glands or minor breaks. Skin abscesses are particularly easy to detect. They are red, raised and painful as a result of the inflammatory response a person's body dispatches to fight off the infection. Unlike cysts, abscesses rarely resolve on their own, and the infection can spread to neighboring tissues if left untreated. An abscess is treated by draining and cleaning it. Some medical providers also prescribe antibiotics to quell the infection.Learn more about Conditions & Diseases
A complicated, or complex, ovarian cyst consists of a sac on or inside of the ovary that contains both fluid and solid components, according to EmpowHER. The solid contents distinguish complex ovarian cysts from simple ovarian cysts, which are only filled with fluid.Full Answer >
The surgical puncture to remove fluid from the pericardial sac is known as pericardiocentesis, according to WebMD. The pericardial sac is a layer of tissue that surrounds a person's heart.Full Answer >
WebMD explains that pain that occurs when bending the knees is a common symptom of bursitis, a condition in which the sac of fluid that protects the knee joints becomes inflamed and irritated due to repeated bending, injury or overuse. Bursitis that is caused by kneeling is often referred to as "housemaid's knee" or "preacher's knee."Full Answer >
A Baker's cyst is a lump or bulge that is caused by a build-up of fluid that collects behind the knee joint. Also called a popliteal cyst, it normally results from arthritis in the knee or torn cartilage, according to Mayo Clinic.Full Answer >