Oncology - STS

Question 1

STS belongs to what group of tumors

Answer 1

Heterogenous group of mesenchymal tumors

Question 2

STS comprise what % of all skin and SQ tumors in dogs and cats

Answer 2

Dogs - 15%

Cats - 7%

Question 3

STS originate where

Answer 3

Connective tissue incl.

Muscle, Adipose tissue, Neurovascular tissue, Facial tissue, Fibrous tissue

Question 4

What type of tumor are STS

Answer 4

Can be either benign or malignant

Question 5

What are fibrosarcomas

Answer 5

Malignant tumour of fibroblast

Question 6

Fibroblast arise from where

Answer 6

Skin, SQ or Oral cavity

Question 7

Fibroblast predispositions

Age, Breed, Sex

Answer 7

Older cats and dogs

No breed or age disposition

Question 8

Peripheral Nerve Sheath Tumour (PNST) are

Answer 8

Malignant tumours of nerve sheath origin

Question 9

Types of PNST

Answer 9

Peripheral - involves nerves away from brain or sp/cord
Root - involves nervers adj. to brain or sp/cord
Plexus - involves nerves of brachial or LS plexus

Question 10

PNST are slowly growing and can range from

Answer 10

0.5-12cm in diameter

Question 11

PNST when it occurs in the proximal axial region shows what clinical signs?

Answer 11

Compression of nerves
Unilateral lameness, muscle atrophy, paralysis, pain
Can invade sp/cord