Pulmonary congestion and oedema

Pulmonary haemorrhage and oedema are features of RHD although, macroscopically, it can be difficult to differentiate agonal changes, such as alveolar collapse, congestion, and alveolar oedema from lung pathology. In this confirmed case of RHD, fibrin thrombi were seen in occasional small capillaries and venules on histopathological examination.