16th February 2025

A 51-year-old lady who smokes tobacco and previously smoked cannabis is referred for pulmonary function tests to investigate difficulty breathing.

A 51-year-old lady who smokes tobacco and previously smoked cannabis is referred for pulmonary function tests to investigate difficulty breathing.

FEV1: 1.5 L (54% of predicted)

FVC: 2.9 L (83% of predicted)

KCO: 75% of predicted

What diagnosis are these results most consistent with?

Select the SINGLE most appropriate option from the list below. Select ONE option only.