Hi!
The diagnosis of a lung nodule depends on the symptoms you have, the size of the nodule, number of nodules and their shape and borders.
A solitary or single nodule in lung area (sub-pleural) can be carcinoid syndrome, tuberculosis, sarcoidosis, hematoma, hamartomas, chondromas, pneumonia, lymphoma or cancer.
If the opacity is well defined, it can be due to pneumonia, cancer, tuberculosis, a benign lung nodule, or due to an infarct. Less well defined or diffuse opacities are usually multiple in nature and often due to inflammation, tuberculosis (military type), asbestosis, silicosis, auto-immune diseases etc.
If the lung nodule is not calcified nor has cavity, it is benign if it is less than 10 mm in size. The possibility of cancer increases in lung nodules that are bigger than a cm and have irregular borders. Also, the possibility of nodules becoming cancerous increases with history of smoking/current smoking/previous history of cancer/family history of cancer.
If the nodule is due to TB then you will also have raised ESR, positive Montoux test and low grade fever or fatigue. Please discuss all this with your doctor to reach a diagnosis. Take care!
Hi there,
Nodules less than 4 mm are usually not very significant. Any allergy, infection, autoimmune condition can give rise to presence of nodules. It would have been really helpful if you had shared details about your symptoms. Any investigation should be correlated clinically. If you are having tuberculosis then you would be having fever and cough for more than 2 weeks, loss of appetite etc.Loss of weight, fever is also seen in cancer. Do clarify your doubts with your doctor. I hope it helps.
Best wishes and regards!