【单选题】A patient presents complaining of bloodstained stools and the inability to completely empty his rectum. He also has pain along the back of his thigh and weakness of the posterior thigh muscles. Digita...
【单选题】A patient presents complaining of bloodstained stools and the inability to completely empty his rectum. He also has pain along the back of his thigh and weakness of the posterior thigh muscles. Digita...