Pneumatosis is frequently a dire finding, indicating bowel necrosis in the setting of bowel ischemia. However, it can be a benign finding in the setting of COPD, ventilation, automimmune diseases such as SLE, certain medications (i.e. steroids, and immunosuppressives)and after endoscopy. Benign causes of pneumatosis tend to cause cystic air bubbles, while the more concerning underlying processes often cause linear air collections, but the primary differentiation if clinical.

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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Cerebral venous sinus thrombosis (CVST) is a rare form of stroke that results from thrombosis (a blood clot) of the dural venous sinuses, which drain blood from the brain. Symptoms may include headache, abnormal vision, any of the symptoms of stroke such as weakness of the face and limbs on one side of the body, and seizures. The diagnosis is usually by computed tomography (CT/CAT scan) or magnetic resonance imaging (MRI) employing radiocontrast to demonstrate obstruction of the venous sinuses by thrombus.
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