What Causes Pain In Upper Left Chest?

Hello. I have been experiencing pain in my upper left chest for quite some time. I do have a lesion on my 3rd anterior rib but do not yet know if it is mets (need further testing). My question is, while I am 99% certain this extreme pain is due to the tumor, I cannot seem to find a 'description' online of the type of pain these tumors cause (eg: dull, sharp, constant, etc.) I dont think it is my heart at all but I do have an extensive cancer history. I am a 36yr old female. Can you describe how rib tumor pain usually is described by patients? Thank you in advance.