Feyza
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heyy ppl...anyone knows the difference between (-) and (+) birefringence??
in the gout & pseudogout Qs in the exam ...in case they dont give the name but define it instead 
prapaid thanx
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O my Lord! Open my chest for me ( grant me self-confidence ) and ease my task for me.Ta-Ha 25-26.
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| keepgoing
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mm feyza (+) birefrin--->blue colour--->Calcium pyropo4 dihydrate crystls--->pseudogout
(-)birefrin----->yellow colour------>monosodium urate crystls--->gout
i think its sufficient to know this for exam plz let me know if we need something beyond this..
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| Feyza
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Topics: 48
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hi KG  its funny...I posted the topic and that minute I came across it in UW...UW says :
(+) means ...crystals when alligned in parallel : YELLOW ...In perpendicular : BLUE
ru sure its (+) is blue and (-) is yellow 
Edited by Feyza on 05/28/07 - 11:22 AM
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O my Lord! Open my chest for me ( grant me self-confidence ) and ease my task for me.Ta-Ha 25-26.
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| keepgoing
Forum Guru
Topics: 62
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hi feyza yes acc. to dr goljan its (+)-->blue and (-)-->yellow..theer are few errors in UW...and also its paralelel postion only, to ray that they impart/reflect specific colour i have not raed if perpendicular also is conidered..if it is thn its too much to know for usmle..i hope..
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| Feyza
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Topics: 48
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ok ur right ... I give up !! I wish I heard about Goljan earlier and could read it too 
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O my Lord! Open my chest for me ( grant me self-confidence ) and ease my task for me.Ta-Ha 25-26.
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