What are the pathological changes of muscles and corresponding diseases?

Small bleeding point of subcutaneous fat, more common in sepsis; When infectious bursal disease occurs, bleeding of medial femoral muscle and pectoral muscle often occurs; In Marek's disease of the skin, there are scabs or tumors on the skin. When there are dense bleeding spots under the skin and muscles, it is more common in septic and severe infectious diseases, such as avian cholera, avian influenza and Newcastle disease. It is also reported that muscular Marek's disease has white necrotic foci in the muscular fullness of chest and back.