Predictors of malignancy are old age, current or past history of smoking, history of extrathoracic cancer, or spiculation in the nodule
lung lobe location.
CT chest with thin sections through the nodule
is recommended, with contrast enhancement if the renal function is intact, transthoracic needle biopsy or bronchoscopy to confirm the diagnosis unless contraindicated. All these findings need to be correlated clinically. Consult an oncologist with your concerns. Hope this helps.