[B] 1.77 Malignant mesenchymal tumors

Question 1

Give the malignant tumours of connective tissue

Answer 1

• Differentiated soft tissue sarcomas
  
  • Fibrosarcoma
  • Myxosarcoma
  • Liposarcoma
  • Chondrosarcoma
  • Osteosarcoma
• Less differentiated/anaplastic sarcomas

Question 2

Feline injection-site sarcoma (FISS)

Answer 2

• Malignant fibrosarcoma
• Very little is known of these

Question 3

Malignant osteosarcoma

Answer 3

• Central (productive or non-productive)
• Peripheral (periosteal or parosteal)

Question 4

Anaplastic sarcomas

Answer 4

• Pleomorph sarcoma = Anaplastic sarcoma = Malignant fibrous histiocytoma
• Divergent group
• Primitive myofibroblast origin?
• Most frequent in dogs
• Golden retriever, rottweiler
• Giant cell type also exists