Brief Answer: There are different causes of focal opacities in chest radiography. You should see a pulmonologist to assess your father s clinical symptoms and the chest radiography result, and after that, he should eventually undergo a CT scan of the chest. Detailed Answer: Hello, Thank you for using HCM. I understand your concern, and I hope, I will help you. There are different causes of localized pulmonary opacities in chest radiography, such as: pneumonia, pulmonary embolism (infarction or intrapulmonary hemorrhage), neoplasm, atelectasis (opacity accompanied by signs of volume loss of the lung affected from it), etc. Even though, to make an adequate differential diagnosis, you should tell me more about the symptoms that your father is experiencing. It is important to know if he has been having some cough, fever, sputum, weight loss etc... Even the other chest radiography finding (both hilar proeminent, can be helpful in reaching a diagnosis, only in combination with clinical information. It is important to be specified if the enlargement is symmetrical or not, and the position of the hila regarding each other too. Just to calm you down, being the hila enlargement, bilateral, makes the likelihood of this lesion, to be a lung cancer much reduced. Even though, to make a sure diagnosis, your father should see a pulmonologist to assess his clinical symptoms and the chest radiography result, and after that, he should eventually undergo a CT scan of the chest. Hope this is helpful. Let me know if you need more clarifications. Otherwise please close and rate the answer. Kind Regards, Dr. Juarda