Sentence examples for a difficult case from inspiring English sources

"a difficult case" is a correct and usable phrase in written English.
It can be used when describing a challenging or complicated problem or situation. For example: 1. The lawyer took on a difficult case that required months of research and preparation. 2. The doctor was faced with a difficult case of a rare disease that had no known cure. 3. The teacher struggled with finding a solution for the difficult case of a student with learning disabilities. 4. The detective was assigned to a difficult case involving a string of unsolved murders. 5. The judge had to carefully consider all the evidence presented in the difficult case before making a ruling.