Hard nodular foci in the left upper lung are described on imaging tests and may be the result of either a pre-existing lung infection or a current infection, as described below.
1. Previously existed: such as pneumonia and tuberculosis, there will be localized cell necrosis, and the scar foci left after healing can be described as left upper lung nodule foci in the imaging examination.
2. Currently exists: when the patient’s body tissue cells are infected, resulting in local fibrous tissue hyperplasia, can also be described as left upper lung nodule foci in the imaging examination.
But do not rule out other factors caused by the patient is recommended to go to the hospital for chest enhancement CT examination, if necessary, do chest lung tissue biopsy, to clarify the specific causes, if necessary, follow the doctor’s instructions standardized treatment.