Dear Sir/Madam, Let me be clear that this is only the radiologists interpretation which I am explaining to you.Your son s X Ray is showing shadows in the perihilar region, which is the area of the lung around the hilum or the root of the lung, where the main respiratory passages and blood vessels enter and leave. Nodularities means that these areas appear more dense or solid than the other areas. Normal lung appears clear or dark on the Xray because it contains only air.The nodularity in your son s case according to the Radiologist who has reported the X Ray is either due to a pneumonia, which is an acute infection of the lungs or due to Koch s, also called Tuberculosis, which is a chronic infection. Both these conditions could look similar on the X Ray. Definite diagnosis has to be made by the doctor who sees and examines the child in correlation with X Ray and other tests. In the case of Tuberculosis, this is a special type of chronic infection, the source is always another human being and it could be through the placenta from the mother also if she is a case. New borns are given BCG vaccine to prevent TB. Both these infections can be treated by antibiotics, but treatment for TB requires a combination of drugs and is long drawn. Hope I have given clarity to the report, which is otherwise perfectly normal.