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 A six-year-old girl has brief, irregular contractions in her feet; symptoms are suspected to be a result of an untreated strep infection. What is the diagnosis? and explain in detail?
Sydenham chorea (St. Vitus dance) - commonest chorea. occurs mainly in girls as a sequela to rheumatic fever. Chorea major (Huntington's disease) -inherited disorder manifests as choreiform movements and progressive dementia. Chorea gravidarum occurs during the 2nd trimester of pregnancy. Ballism and hemiballism -violent flinging movement of one or both extremities due to infarct of the subthalamic nucleus.