An 85-year-old female patient, already suffering from Hypothyroidism, B.asthma, and Hypertension. Inspite of taking the treatment for each and every symptom till now, she is having frequent respiratory infections, joints pain, gum problems. 15 days ago she had a respiratory infection with exaggerated asthma and was treated with antibiotics, inhalation, and bronchodilators.

She has become very weak and lost much weight also. Her CBC is normal now, blood sugar is also normal. X-ray chest PA view shows: ILD Interstitial fibrosis of lungs A malignancy shadow like seen at the left lower lobe near the apex of lv CT scan is inclusive, advice further on how to confirm the diagnosis?