Neoplasia Flashcards
Primary bony neoplasia
Neoplasia arising directly from the bone
Secondary bony neoplasia
Spread from an adjacent site
Monostotic
Lesion affecting a single bone
Polyostotic
Lesion affecting more than one bone
Thoracic CT can be done for lesions of what size
1 mm
Thoracic radiographs can be done for lesions
7 - 9 mm in size
Most common primary bone neoplasm
Osteosarcoma
Types of osteosarcoma
Endosteal, periosteal, parosteal
Endosteal
Arises from the medullary cavity
Periosteal
Arises from periosteum can invade the medullary cavity from periphery and cause bony lysis and reactive bone formation
Parosteal
Arises from periosteum forms an expansive mass that surrounds but does not invade cortical bone
What is the least aggressive form of osteosarcoma
Parosteal
4 radio graphic findings of osteosarcoma
Cortical lysis, periosteal reaction, extension of osteogenesis into adjacent soft tissues, loss of trabecular pattern in metaphyseal bone
Radiation therpahy of osteosarcoma
Sterotactic radio surgery , palliative
MST osteosarcoma amputation
3 - 6 months
ST amputation wiht chemotherapy
12 - 14 months
RT Alone MST
4 - 10 m
Conservative management st
2 - 3 months
Second most common appendicular primary bone neoplasma
Chondrosarcoma
Treatment of choice for Chondrosarcoma
Amputation
Better prognosis of chrondrosarcoma if it is where
Skull or appendicular
Sites commonly affected by secondary bone neoplasia
Humerus, femur, and vertebrae
Is amputation recommended secondary bone neoplasia
No
Examples of joint neoplasia
Synovial cell sarcoma and synovial hisocytic sarcoma
Common sites of synovial cell sarcoma
Elbow and stifle
Treatment of synovial cell sarcoma and
Amputation
Common sites of synovial histiocytic sarcoma
Stifle
