BMJ Case Reports blog aims to foster an exchange of ideas as well as influence what BMJ Case Reports offers its readers. You are welcome to join in and comment on any of the articles, or draw our attention to what else is important in your field. Postings will be screened but we are keen to encourage robust debate so as long as you’re comments are relevant and not libellous or abusive you will be heard. There are no word limits – ask a seemingly daft question or simply point out when something doesn’t make sense. The conversation starts here.