What Do PTB Of Undetermined Activity, Left Upper Lobe And Cardiomegaly Mean While Having Fibrohazed Densities And An Enlarged Heart?

Can please someone explain this further. Thank you. My father is 58 years old. CHEST PA: Fibrohazed densities are seen in the left upper lobe. The heart is enlarged. Diaphragm, Costco phrenic sinuses and bony thorax are intact. IMPRESSION: PTB of undetermined activity, left upper lobe Cardiomegaly