With this column, typical case reports of significance will be collected from the West China Second University Hospital, Sichuan University/West China Women's and Children's Hospital.

Guest Editors: Omer Lutfi Tapisiz and Sadiman Kiykac Altinbas (Guven Hospital, Ankara, Turkey)

Guest Editor: Hooman Soleymani Majd (Oxford University Hospital NHS Trust, Churchill Hospital, Oxford, UK)