MISC JOINT LESIONS

Question 1

clonal proliferation of cells with consistent chromosomal abnormalities

M=F
red-brown to mottled orange-yellow color
convoluted synovium
-finger like projections
-tangled mat
-bland mononuclear cells and giant cells
hemosiderin, foamy macrophages and sclerosis

monoarticular arthritis
pain
limited ROM
can erode into adjacent bone

Answer 1

tenosynovial giant cell tumor diffuse type (pigmented villanodular synovitis)

Question 2

manifests as solitary, slow growing, painless mass

involves tendon sheaths along wrist and fingers

Answer 2

tenosynovial giant cell tumor localized type (tendon sheath)

Question 3

inflammation of bursa

shoulders, elbow, knee, radius

Answer 3

bursitis

Question 4

herniation of synovium through joint capsule or massive enlargement of bursa

***baker cyst

Answer 4

bursitis

Question 5

small cystic lesiosn

arises in collagenous CT of joint capsule or tendon sheath

cystic or mucoid degeneration of CT
-no communication with joint space

Answer 5

ganglion cyst