Hazy densities are seen in the left lung apex. what does it mean?

You should see a lung doctor to review your x-ray or CT scan to find out what needs to be done next. This is a general finding and the possible causes are many so it is better to have your particular case, including your symptoms and physical exam as well as the x-ray results, reviewed by a lung doctor so you can have further testing, if needed, followed by any needed treatment. Good luck!