Case reports are increasingly hard to publish. While there are many open access journals that are great, there are many more that will charge you $2,000 to 'publish' your case report and happily accept it. Not a guarantee of quality, but check if the journal is on pubmed or that it has an impact factor. Sometimes you can just send a quick personal email to the journal editor saying you have a case report about X and do they think it may be suitable for their journal. Often you will get a quick and useful reply.