Synovial cyst

Knee joint synovial cyst
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Aneurysmal bone cyst

Aneurysmal bone cyst is a benign osteolytic bone neoplasm characterized by blood filled spaces separated by fibrous septa. The term aneurysmal is mainly derived from its macroscopic appearance.
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Tornwaldt cyst

A Tornwaldt cyst is a benign cyst located in the upper posterior nasopharynx. It can be seen on computed tomography (CT) or magnetic resonance imaging (MRI) of the head as a well-circumscribed round mass lying in the midline.
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Renal cyst

A renal cyst is a fluid collection in the kidney. There are several types based on the Bosniak classification. The majority are benign, simple cysts that can be monitored and not intervened upon. However, some are cancerous or are suspicious for cancer and are commonly removed in a surgical procedure called nephrectomy.
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Ovarian cyst

An ovarian cyst is any collection of fluid, surrounded by a very thin wall, within an ovary. Any ovarian follicle that is larger than about two centimeters is termed an ovarian cyst. An ovarian cyst can be as small as a pea, or larger than an orange.
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Arachnoid cyst

Arachnoid cysts are cerebrospinal fluid covered by arachnoidal cells and collagen that may develop between the surface of the brain and the cranial base or on the arachnoid membrane, one of the three membranes that cover the brain and the spinal cord. Arachnoid cysts are a congenital disorder, and most cases begin during infancy; however, […]
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Baker’s cyst

A Baker’s cyst, also known as a popliteal cyst, is a benign swelling of the semimembranous or more rarely some other bursa found behind the knee joint.
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Nabothian cyst

A nabothian cyst (or nabothian follicle) is a mucus-filled cyst on the surface of the cervix. They are most often caused when stratified squamous epithelium of the ectocervix (toward the vagina) grows over the simple columnar epithelium of the endocervix (toward the uterus). This tissue growth can block the cervical crypts (subdermal pockets usually 2-10 […]
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