My spirometry:slight restrictive shape of curve.moderate expiratory limitation.examination for extrathoracic obstruction & expiratory trachealstenosis?

Limited info: This is a very limited description of flow volume loop on spirometry. This has to be interpreted with other parameters (fvc, fev1 etc.) to get the complete picture. Since there is concern for an expiratory flow limitation & possibly restriction/mixed defect, you will require further testing including lung volumes by plethysmography & other tests. Recommend evaluation by a pulmonologist asap.

HRCT: Extrathoracic obstruction may result in changes in airflow both on inspiration and expiration depending on where the obstruction is located. If your physician is investigating an extrathoracic cause, an HRCT is indicated. Sometimes enlarged lymph nodes may impinge on the airway as one possible cause. The restriction is mild and may be due to a number of causes such as fibrosis or scarring.