MS neoplasms and disorders that resemble neoplasms

Question 1

rock hard mass is typical of a benign but aggressive

Answer 1

desmoid tumor

Question 2

only study necessary to diagnose benign bone lesions

Answer 2

plain radiographs

Question 3

this study identify additional skeletal lesions without performing multiple radiographs

Answer 3

technetium bone scan

Question 4

elevated serum Ca and depressed serum P

Answer 4

hyperparathyroidism

Question 5

elevated ESR with anemia

Answer 5

neoplastic dse such as multiple myeloma

Question 6

why brown tumor of hyperparathyroidism is mistaken for GCT?

Answer 6

histologic pic of multiple giant cells, hemorrhage and fibrous tissue

Question 7

infection of bone due to bacteria

Answer 7

osteomyelitis

Question 8

rare idiopathic disorder where there israpid periosteal bone formaion

Answer 8

infantile cortical hyperostosis (caffey’s dse)

Question 9

Fever, leukocytosis, increased ESR accompanies periosteal new bone formation is characteristic of

Answer 9

caffey’s dse

Question 10

idiopathic disorder where there is increased bone resorption and formation, char lesions cause pain, deformity and fracture

Answer 10

paget’s dse (osteitis deformans)

Question 11

age group of paget’s

Answer 11

rarely before 20 and most are >50

Question 12

phases of paget’s dse

Answer 12

purely lytic
mixed lytic and blastic
blastic

Question 13

this occurs following traumatic/surgical interruption of the blood supply in association with corticosteroid use, radiation thearpy or sickle cell anemia

Answer 13

bone infarct/avascular necrosis

Question 14

consist of discrete areas of mature lamellar bone within the medullary cavity

Answer 14

bone island

Question 15

what is the radiographic appearance of a bone island?

Answer 15

rounded lesion <2cm in size located within the cancellous bone

Question 16

fluid filled cavities within bone lined by thin layer of fibrous tissue

Answer 16

simple, unicameral bone cyst

Question 17

age group of simple bone cyst

Answer 17

<15

Question 18

large fibrous cortical defects that extend into intramedullary region

Answer 18

non-ossifying fibromas

Question 19

lytic bone lesions that consists of fibroblasts arranged in whirled bundles, scattered giant cells and regions of histiocytes

Answer 19

fibrous cortical defect and nonossifying fibroma

Question 20

metaplastic bone formation of irregularly arranged bone trabeculae in bland fibrous tissue

Answer 20

fibrous displasia

Question 21

radiographic finding in fibrous dysplasia

Answer 21

circumscribed areas of decreased bone density having a ground glass or shower door glass appearance

Question 22

formation of benign bone, cartilage, fibrous tissue within contused muscle

Answer 22

myositis ossificans

Question 23

lesions initially consists of an area of soft tissue swelling that becomes progressively mineralized to contain bone

Answer 23

myositis ossificans

Question 24

proliferation of fibroblasts, capillaries and inflammatory cells; tender soft tissue mass most often in subQ tissues

Answer 24

nodular fascitis

Question 25

unilocular or multilocular collections of translucent fluid or gelatinous myxoid tissue surrounded by fibrous tissue

Answer 25

ganglion cyst