A kidney nodule, also referred to as a kidney cyst, is a formation in the kidneys that consists of a round pouch of fluid, according to Mayo Clinic. Typically, kidney cysts or nodules are noncancerous, but they may be a symptom of a disorder that could impair kidney function.Know More
Although smaller cysts don't typically produce signs or symptoms, common symptoms of a larger kidney nodule or cyst include fever, upper abdominal pain or dull pain on the back or side of the body, according to Mayo Clinic.
As people age, they become more at risk for kidney cysts, states Mayo Clinic. Although kidney nodules or cysts can cause only minor discomfort, in extreme cases, complications such as an infected cyst, a burst cyst or urine obstruction may occur. When kidney cysts become infected or burst, they may cause fever or pain in the back and side of the body. If a urine obstruction occurs, a blockage in the flow of urine may result in swelling of one or both kidneys.
As of 2014, a specific cause of kidney nodules or cysts is unknown, but theories suggest that these cysts develop when a pouch is formed on the surface layer of a weakened kidney, according to Mayo Clinic.Learn more about Conditions & Diseases
Kidney Cancer Institute explains simple kidney cysts do not pose a cancer risk to patients, whereas complex kidney cysts have different characteristics that may make them cancerous. A simple kidney cyst is spherical, is filled with liquid and contains a thin outer membrane. A complex kidney cyst is usually irregular, contains calcified material and has a thick outer membrane.Full Answer >
A thyroid nodule is a solid or fluid-filled lump that forms within the thyroid, according to Mayo Clinic. The majority of thyroid nodules are not serious and aren't noticed until discovered by a doctor during a routine medical evaluation.Full Answer >
According to the National Center for Biotechnology Information, "hypoechoic" refers to being filled with fluid or solid. A hypoechoic ovarian cyst is therefore a mass on the ovaries that is solid or fluid-filled. Depending on the complexity of the cyst, a hypoechoic ovarian cyst might be cancerous or benign, Ovary Disease points out.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 >