Can you give us a vague idea of the topic of your case report? Hearing loss? Surgical procedure? Device?
There are a number of reputable journals that take case reports, though some are quite specific in their purview. It would be helpful to have some idea of your subject. A journal I am aware of that broadly takes solid case reports (not sure about high rate of acceptance though) is BMJ case reports. A specific journal tailored to your topic though might be better though. You can always ask the advice of senior authors for good-fit journals.
A lot of open-access journals are unfortunately scams. If they enthusiastically accept your case report and then ask you to pay a publication fee of over $1k I think this is generally a solid indication that they are a predatory journal. Beall's list is a good, although not comprehensive, resource for looking up whether a journal is likely to be predatory.
