You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Simple bone cyst is most commonly seen in - and explain in detail?
Ans. is 'a' i.e., Proximal humerus Simple Bone Cyst* This lesion is also known as a solitary cyst or unicameral bone cyst.* It appears during childhood, typically in the metaphysis of one of the long bones and most commonly in the proximal humerus or femur.* It is not a tumor, it tends to heal spontaneously and it is seldom seen in adults. The condition is usually discovered after a pathological fracture or as an incidental finding on x-ray.* X-rays show a well-demarcated radiolucent area in the metaphysis, often extending up to the physeal plate; the cortex may be thinned and the bone expanded. Fallen fragment sign is seen if pathological fracture develops. After pathological fracture a cortical fragment is seen in the most dependent portion of cyst, like a fallen fragment.