Introduction
- Congenital abnormalities of lungs are very rare, but most common in cattle
- Most congenital abnormalities are incompatible with life
Accessory Lungs
Ciliary dyskinesia
Pulmonary Congenital Melanosis
Pulmonary Congenital Atelectasis
Congenital lobar emphysema
Pulmonary hypoplasia
- Mostly associated with congenital diaphragmatic hernia
Congenital alveolar dysplasia
- Most common in dogs
- Grossly:
- Lungs retain fetal appearance and are poorly aerated
- Histologically:
- Uneven size and shape of alveoli, smaller number overall
- Dilated blood vessels within extensive interstitial tissue
- It is possible that in utero infection may contribute to this