1. Malignant bone tumors are aggressive cancers that rapidly destroy tissue and commonly spread to other areas. They make up about 0.5% of all cancers. 2. The most common malignant bone tumors are metastases from other primary cancers, which account for 70% of cases. Primary bone cancers include osteosarcoma, chondrosarcoma, and Ewing's sarcoma. 3. Diagnosis involves imaging like x-rays, CT, and MRI to identify bone destruction and tumor extent. Biopsy is needed for histological examination to determine the tumor type and grade. Treatment depends on the cancer but commonly involves surgery along with chemotherapy and radiation.

1. MALIGNANT BONE
TUMORS
DR.MANOJ GODARA
2ND YR ORTHO RESIDENT
GUIDE – DR. ARUN VAISHY
professor & H.O.D
Department of orthopedics
Dr S.N Medical college,
jodhpur

2. DEFINATION –
. Malignant bone tumors are those that are biologically
more aggressive not only they cause rapid tissue
destruction but also have greater incidence of spread and
metastasis
. Malignant tumor of bone and cartilage
constitute about 0.5% of all malignant tumor
. Primary bone tumors are relatively rare
. Metastatic bone tumors are the most common malignant
tumors of skeleton system.
70%of all malignant tumors are metastatic in nature

3. Characteristics of malignant bone
tumors
. They have aggressive spread, metastasis and
invasiveness to surrounding tissue
. More rapid increase in size.
. less differentiation
. They have wide zone of transition and interrupted
periosteal reaction.
. ill-defined and irregular bone margins

5. CLASSIFICATION OF MALIGNANT BONE TUMORS

8. Enneking staging for malignant Tumors
It is based on histological grade ,local tumor extent
(whether confined to anatomical compartment or not)
and the presence and absence of metastasis

9. Malignant bone tumor
Primary bone tumors
30%
Secondary bone
tumors 70%
Multiple myeloma -most commo
Osteosarcoma
– 2ndmost common
. Chondrosarcoma
. Ewing's sarcoma
. Chordoma
. Fibrosarcoma
Secondaries are metastasis of
other primary tumors of body.
They arises from Lungs, breast
or prostrate cancer.
Most common site of deposition
of secondaries are vertebra and
pelvis

10. Osteosarcoma
• Def :-Primary malignant tumor in which
malignant mesenchymal cell
produces osteoid or immature bone
. most common primary malignant tumor of the bone
excluding those of hematopoietic origin like multiple
myeloma
. Incidence :- 1:3 per 1 million /year
peak incidence at second decade of life
more prevalent in male then in female.

12. • Classified as Primary and secondary
osteosarcoma
PRIMARY OSTEOSARCOMA
. High grade – Conventional osteosarcoma ,
Telangiectatic osteosarcoma
small cell osteosarcoma
.low grade – central osteosarcoma
perosteal osteosarcoma
.intermediate grade – periosteal
osteosarcoma

15. Clinical features
• .Most patients usually present with
persistent pain
. Deep ,firm , fixed mass
. Swelling usually develops at the end of
long bones and its consistency varies
from soft ,almost fluctuant to firm and
indurated to bony hard
. Overlying skin may become stretched,
thin and glossy
. Motion of adjacent joint is unimpaired until the
muscle acting on the joint became involved

17. Diagnostic
• Plain x-ray finding
variable mixture of radio-opacity due to
osteogensis and radiolucency due to
destructive changes .

18. • . Irregular destruction in metaphysis .
.New bone formation
. Periosteal reaction
.sunburst appearance :-> fine lines of increase densities ,
representing newly formed spicule of bone ,radiate laterally
from bone at the right angle from the shaft

20. Sometimes pathological
fractures may be seen
on
X-RAY imaging

21. . MRI
help to determine the level of resection and preoperative
planning
Used to know the soft tissue extent
•
to screen the skip lesion and find out the involvement of
the medullary canal,epiphysis and physeal plate
CT-SCAN
Not much of use in diagnosis of
osteosarcoma
H RCT chest to detect lung metastasis which is the most
common site of metastasis.

22. Angiogram

23. Bone scan

24. Laboratory findings

28. • No pain and no tenderness
• Wide sx excision is the t/t

29. Prognostic factor
• Poor prognostic factor includes
-Mets at the time of presentation
-Primary tumor located in axial skeleton
-large tumor
-increase ALP and LDH
-Poor response to prior chemo

30. Treatment protocol

31. .For high grade osteosarcoma - surgical excision of
primary tumor with chemotherapy
.Multi agent chemotherapy is the standard care in
osteosarcoma
.Most current protocol incorporate these agent in
three or four drug combinations

32. CHEMOTHERAPY

34. Surgery

35. LIMB SALVAGE
SURGERY

37. ROTATIONPLASTY

40. FOLLOW-UP AND
PROGNOSIS

41. CHONDROSARCOMA
• Chondrosarcoma is a malignant tumor of cartilage
producing cells.
• Most common sarcoma of bone in patient over 20 yrs of
age.
9 percent of all primary malignancy of bone…
.Usually beyond 3rd decade of life but peak incidence in the
5th to 7th decade
.M.F= 3:2
.Pelvic is the most common site (ilium) followed by
proximal humerus ,proximal femur and ribs are the
other site

42. Who classification

44. Clinical features
. Deep ,dull pain (worsen at night ,insidious
progression over months )is most
common presentation
. local swelling
.pathological fractures (in high grade
chondrosarcoma)rare
presentation
.Neurovascular disturbance with loss of motion

45. Diagnostic
• On Plain radiograph (X-RAY)
. Expansion of medullary portion of bone with
cortical thickening is typical finding.
. Periosteal reaction is scant/absent
. Irregular matrix calcification- punctuate ,
popcorn, comma shaped calcification( rings and
arcs appearance) •

49. • CT SCAN
Differentiate benign from malignant lesion • For
characterization of lesion in anatomically complex
areas- sacrum and spine
MRI
.Depict high water content of lesion with lobulation
at margins
.Best to see intramedullary extent , Cortical
erosion, bone destruction, reactionary edema, soft
tissue extention are well depicted.
.It helps in differentiating Enchondromas with
chondrosarcoma

50. MRI

52. Bone biopsy and histological findings
• Histology Composed of malignant cells with abundant
cartilaginous matrix, cartilage permeates the host
bony trabeculae
Histologically three grades
Grade 1- less cellular and less nuclear atypia.
Grade 2 - ↑ cellularity and nuclear atypia
Grade 3- ↑ ↑ cellularity and pleomorphic anaplastic
cells

53. Gross appearance

54. Differential Diagnosis
Enchondroma
.enchondroma and low grade chondrosarcoma
radiologically as well as histologically appear
similar
Both located in metaphysis with stippled calcification
and endosteal scalloping
•
But in chondrosarcoma endosteal scalloping is
present in >2/3 rd of area and aggressive changes
such as bone destruction ,cortical erosion ,periosteal
reaction , soft tissue mass is more marked

56. Treatment
. These tumor generally not sensitive to chemotherapy and
radiotherapy and surgery is the only reliable treatment
.for grade 1 chondrosarcoma-
if endosteal scalloping and cortical erosion absent on x-ray ,no
contrast uptake and no mass on MRI then extended
intralesional curettage can be done but if present then we goes
for wide resection
.for grade 2 & 3 –
wide resection is the only treatment modality
10 yr survival rate
grade 1 – 90%
grade 2 – 40-50%
grade 3 – 15-20%

57. SECONDARY CHONDROSARCOMA
• Chondrosarcoma arising in a known benign precursor
lesion
ex- osteochondroma , enchondroma
olliers disease, Maffuccic syndrome-25-30%
.develops at somewhat earlier age then primary
.usually low grade malignancy and have favorable
prognosis
.plain radiograph shows increase thickness in
cartilaginous cap in osteochondroma and destructive
permeation of bone and soft tissue mass in
enchondroma
T/t- complete wide surgical excision

59. INTRODUCTION
• 2ND most common malignant tumor of late childhood
and early adulthood
• incidence 0.3/100000/yr
• This small blue round cell tumor is arise from
mesenchymal cells
• more common in males
• Peak incidence during first two decade of life
• cytogenetic- most commonly a reciprocal
translocation with FLI1 gene on chromosome 11
t(11;22)

64. • CT scan- to evaluate the pattern of bone
destruction
• MRI- to identify extra osseous and bone
marrow involvement
• v

73. CHORDOMA
• Low to intermediate grade malignant tumor of cranium and
spine
• Arise from the embryonic remnant of notochord
• account 1-4% of all bone malignancy
• Age- 5th -6th decade of life
• M>F
• Site- sacrococcygeal region (40-50%)
base of skull(35-40%)
vertebrae (15-20%)
C/F- mild and intermittent pain in rectal and anal region
constipation and urinary difficulty
neurological spine in chordoma of spine
cranial nerve palsy in skull base chordoma

74. • Plain x-ray shows destructive bony lesion with
in the vertebral body and surrounding soft
tissue mass.

75. Complete en bloc surgical resection is the
treatment of choice
• local recurrence varies from 15-20%
• 5% of chordoma show lung ,skin and brain
Mets

76. MULTIPLE MYELOMA

82. • MRI – for detecting thoracic and lumber spine lesion
• Bone scan – more then 50% lesion can be missed
• plain radiography shows diffuse osteoporosis and lytic
lesion
• no reactive bone formation