Typically seen in the pulmonary vessels of cats with [[Aelurostrongylus abstrusus]] infection. The pneumonia regresses and leaves behind the hypertrophied pulmonary arteries which are clinically insignificant. | Typically seen in the pulmonary vessels of cats with [[Aelurostrongylus abstrusus]] infection. The pneumonia regresses and leaves behind the hypertrophied pulmonary arteries which are clinically insignificant. |