Lung markings of this type, located in the peripheral parts of the lungs, with extension to the pleura could indicate early fibrosis, a type of lung scarring, but need not be indicative of any disease or, if disease, need not be progressive. The pulmonary specialist will probably order a CT scan of the lungs to better characterize these findings and will then be able to advise you whether or not further diagnostic testing is warranted.
As noted, above, these findings need not be indicative of any lung disease and this would be even more likely if your lungs were clear, with no sounds called rales, when listened to with a stethoscope.
Funny I was at the Doctor's office for my appointment as you were posting a reply. You were right he did order a breathing test and CT scan as well. He gave me a physical and checked my chest he said everything seemed fine and on rales or wheezing. He then said he wasn't to happy with the initial xray so we went into the next room and he did another on the spot. He then pulled it up so we could look at the results, he said the xray looked normal. He is going to do the CT just to be safe since the other xray dept said there was something there. Thanks for the help.
By the way I didn't mean what is Interstitial Fibrosis is I just meant the findings in general. Also I did work in a steel plant when I was a teenager. They used to cut sheets of metal and I remember there was always a lot of dust in the air. Maybe that has something to do with it.
Thanks