None of those symptoms.
If you are referring to my post comments with your comment None of those symptoms, and not the link, then I should clarify:
My father had exactly these symptoms:
For the last 3 weeks or so I have had a dull pain right below the bottom of my ribcage on the left side. At times it would become sharp, like a stabbing pain and I would not be be able to take a deep breath during that time. I would cringe in pain during these times. After a while it would go back to a dull ache. This went on, like I said, on and off for the past three weeks.
...culminating in sharp pains and difficulty breathing that led him to the ER after many days of thinking he 'just pulled something' coughing. He went to the ER believing he had another bout of severe pneumonia; boy was he wrong. The doctor, as I recall, told him it wasn't life-threatening, but could have gotten much worse untreated. I recall that he had an MRI to detect the mass.
Again, your comment 'none of those symptoms' diverges from what you wrote on your initial post. Go to the link. Not trying to diagnose; just trying to help you guide your doctor(s).
Doctors, after all, like lawyers, PRACTICE their professions...