Worthless ones.
Case reports are not difficult and if you are going to publish in something, aim for a note-worthy journal. Derm has plenty of low impact factor journals and stuffing up 10 case reports into the even lower/easier/faster ones is hardly impressive. Try for the JAAD or JAMA and as a headsup, even they have been clamping down on case reports recently. We need more worthwhile literature in derm, not CV stuffing case reports.