What Is a Subchondral Bone Cyst? It's a fluid-filled sac that forms in one or both of the bones that make up a joint. They're especially common at the knee or hip. The cysts show up just under the ...

First described in 1942, Stafne bone defects (SBDs), are well-defined, radio-lucent lingual depressions of the lower jaw bone that are asymptomatic and most frequently diagnosed in middle-aged men.

Both arteriovenous malformations and solitary bone cysts can present in the mandible. Mental nerve paraesthesia can be a presenting feature with both types of lesions and diagnosis may be difficult.

A synovial cyst of the spine is a fluid-filled sac that develops along the spine. It may cause pain, tingling, or cramping in the lower back and legs. Treatment may include medications, observation, ...