Please make me a presentation for my obg class on mass per abdomen, start with complete list of differentials for a mass per abdomen with gynec and non gynec division, then differentiating between abdominal and pelvic mass, then for each differential in one slide a brief typical history it's clinical examination and investigation, then differentiating between a superficial and deep abdominal mass, then pelvic mass on clinical examination the findings for different methods such as on p/s and p/v, then clinical features of benign vs malignant on examination and investigations and history as a difference table talk, then talk about rmi score then the iota score, And end with age related distinctions