Artifact emphysema.
D001329:Autolysis / Q000175:diagnosis; D003937:Diagnosis, Differential; D005557:Formaldehyde; D006652:Histological Techniques; D006801:Humans; D008168:Lung / Q000473:pathology; D011656:Pulmonary Emphysema / Q000175:diagnosis* / Q000473:pathology; D013048:Specimen Handling; D013997:Time Factors
D005557:Formaldehyde