Additional contraindications include the following: Bleeding disorder or anticoagulation that cannot be corrected and platelet count < 50, 000 / mcL (< 50 × 10 9 / L) Bullous lung disease Contralateral pneumonectomy Hydatid cyst Intractable coughing Mechanical ventilation Pulmonary hypertension Putrid lung abscess Suspected vascular lesions Procedure Transthoracic needle biopsy is usually done by an interventional radiologist, often with a cytopathologist present.