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Flashcards in 26 morph Deck (29)
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1

bone lacks medullary canal = no hematopoetic marrow

osteopetrosis

2

erlenmeyer flask deformity

osteopetrosis

3

neural foramina small

osteopetrosis

4

nml bine, but decreased quantity of trabecular bone

osteoporosis

5

Mosaic pattern of lamellar bone. 'Jigsaw puzzlelike' d/t unusually prominent cement lines orienting lamellar bone

sclerotic phase Paget Disease (osteitis deformans)

6

'Cotton wool' appearance.

Paget Disease (osteitis deformans)

7

wedge shaped empty lacunae that are surrounded by ruptured adipocytes, which can have assoc fat saponification (may remain for life).

Osteonecrosis (avascular necrosis)

8

tissue paper cells

goucher dis: Osteonecrosis (avascular necrosis)

9

Involucrum: .
o : . (pic)
o : .

pyogenic osteomelitis
=subperiosteal new bone encasing the inflamm focus

10

Brodie abscess

pyogenic osteomelitis
=small, walled off intracortical abscess

11

gummas

Skeletal Syphilis (congenital)

12

well circumscribed nodules of translucent cortical, interlacing woven bone (nidus) rimmed by osteoblasts; surrounded by vasc and loose CT

osteoid osteoma and osteobalstoma

13

formation of bone by tumor cells*; fine, lace-like pattern or may be deposited in broad sheets

osteosarcoma

14

sessile/peduncleated solitar, cartilage cap mass; cortex of the stalk merges with the cortex of the host bone so that the 2 medullary cavities are continuous.

Osteochondroma (exostosis)

15

multiple cartilaginous tumors of hands and feet

chondroma

16

 Translucent gray-blue tumors, < 3cm with limited growth potential.
 Well-circumscribed nodules of benign hyaline cartilage.
 Peripheral portion of the nodules may undergo enchondral ossification and the center can calcify and infarct.

chondroma

17

spindle cell hemangioma

maffucci synd

18

malig tumor producing cartilage on the axial skeleton (pelvis, shoulder, ribs)

chondrosarcoma

19

 Transluscent cartilage w gelatinous or myxoid matrix (may ooze from cut surfaces).
 Spotty calcifications.

chondrosarcoma

20

homer-Wright rosettes

Ewing Sarcoma Family Tumors (ESFT) (including PNET)

21

tumor rich in glycogen, hem, necrosis

Ewing Sarcoma Family Tumors (ESFT) (including PNET)

22

onion-skinning

Ewing Sarcoma Family Tumors (ESFT) (including PNET)

23

expansile lesion w well defined margins at metaphysis of long bones

Aneurysmal Bone Cyst (ABC)

24

.5cm on metaphysis of distal femur, prosimal tibia, storiform (pinwheel) pattern and foamy mfs clustered in giant cells

Fibrous Cortical Defect (metaphyseal fibrous defects) and non-ossifying fibromas

25

 Curvilinear trabeculae of woven bone that resemble Chinese characters.
 Cystic degeneration, hemorrhage and foamy Mf.

Fibrous Dysplasia

26

Mature adipocytes and scattered spindle cells w hyperchromatic nuclei

well-diff liposarcoma

27

Myxoid matrix, 'chicken wire' vessels, round cells, lipoblasts.

myxoid liposarcoma

28

eos cells interecting at right angles

leiomyoma

29

o Pleomorphic eosinophilic spindle cells.
o Blunt-ended hyperchromatic nuclei in interweaving fascicles.

leiomyosarcoma