Bone cyst of the knee

There are three types of bone cysts: traumatic bone cyst, aneurysmal bone cyst and unicameral bone cyst. They are benign are do not spread to other parts of the body.Traumatic bone cysts tend to occur in the jaw and facial bones after trauma.Aneurysmal bone cysts (ABC) are typically found in children and adolescents. They are composed of numerous blood-filled channels which creates an expanded lesion within the bone. The cause of these are unknown.Unicameral bone cysts (simple bone cysts) are cysts or cavities that form in the bone and are filled with fluid. They are considered latent or active depending on their location. Active bone cysts are located near the epiphyseal (growth) plate and will continue to grow until it fills the entire diaphysis (shaft). Latent cysts are located away from the epiphyseal plate and will heal with treatment or resolve on their own.