Atlas of pathology
Where: musculoskeletal system
Differential diagnosis: Other
The image belongs to a lesion on a fattener's loin, after being slaughtered and quartered, and shows a haematoma that delves deep into the muscle.
The cause is a strong blow before slaughter on the dorsal region of the animal.
The most common reasons are: improper handling of the animals or fights between them before loading.
In this case, fights had been observed in the batch this male pig belonged to previous to transport.