the best way to have proper diagnosis is FNAC from the lung nodule. the aspiration fluid should also taken for the test for culture and sensitivity and especially for fungal infections. the management will depend on the result. depending on the history you have given it may be fungal infection which is difficult to diagnosis and treatment. this is not same with cancer. diagnosis is npwadays is easy and have treatment options especially in early stages.If the diagnosis is not established with FNAC then another way is biopsy
,- done by radiologists or surgical oncologists and pulmnologist.