P2: Types of Synovial Fluid crystal Flashcards
1
Q
1-2 microns or 5-20 micron needles; rarely spherolites
A
MSU
2
Q
1-50 micron clumped spherical aggregates; isotropic
A
BCP
3
Q
5-30 micron bipyramidal octahedron; birefringent
A
Calcium oxalate
4
Q
notched plates, needle, rhomboid or 1-5 micron crystals
A
Cholesterol
5
Q
1-20 micron spheres, Maltese cross appearance
A
No answer
6
Q
1-20 micron rhombic, rods or rectangles
A
CPPD
7
Q
Stained via Alizarin Red S
A
BCP
8
Q
Similar to MSU or CPPD in appearance
A
Corticosteroids
9
Q
Ethanol or ether soluble crystals
A
Cholesterol
10
Q
Blunt with jagged edge without clear crystal structure
A
Corticosteroids
