Dear friend, welcome to HCM.
what was your trouble for which x ray
the CP angle blunting occurs if there is fluid collection around the lungs or disease/ thickening of the pleura(lung covering),
other features are normal.
it is not worrisome if you have no symptoms.an USG exam cal tell if there is fluid or thickening.
pl. post details to enable an opinion.or seek your physician opinion.
take care and pl. keep me posted on your progress.