High impact journals don’t publish case reports in 2019.
Similar to the fact that previous generations could buy a home for a reasonable cost, make a killing in medicine, not have to deal with clipboard nurses, get 6% on savings/bonds, pay for med school with a summer job, get a pension, get social security, etc. - older generations could get R-level grants without a PhD and publish much more easily.
Sorry for the rant, back to your question. Very few places do case reports, many of them are somewhat predatory.