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#1
10-12-2012
 USMLE Forums Scout Steps History: Not yet Posts: 39 Threads: 10 Thanked 46 Times in 9 Posts Reputation: 56
Kappa lambda light chain ratio

Which of the following kappa / lambda ratios is found in normal serum:

a- 4 : 1
b- 3 : 1
c- 2 : 1
d- 1 : 1

NOTE: The reason I'm asking this is because I'm looking at two conflicting sources.

#2
10-12-2012
 USMLE Forums Master Steps History: 1+CK+CS+3 Posts: 1,186 Threads: 119 Thanked 815 Times in 434 Posts Reputation: 825

i remember reading it somewhere as 2/1...but i'm not sure..they must be equal i guess

thanks
#3
10-12-2012
 USMLE Forums Scout Steps History: Not yet Posts: 39 Threads: 10 Thanked 46 Times in 9 Posts Reputation: 56

Actually they can't be equal unless neoplasia is going on.

Its either 3:1 or 2:1. Pathoma says 3:1, and all other online sources say 2:1.

I just saw this question and didn't know what was the correct answer.
#4
10-12-2012
 USMLE Forums Master Steps History: 1+CK+CS+3 Posts: 1,186 Threads: 119 Thanked 815 Times in 434 Posts Reputation: 825

Quote:
 Originally Posted by checcles Actually they can't be equal unless neoplasia is going on. Its either 3:1 or 2:1. Pathoma says 3:1, and all other online sources say 2:1. I just saw this question and didn't know what was the correct answer.
ok..thanks...i think 2/1 is correct one....
#5
10-12-2012
 USMLE Forums Scout Steps History: Not yet Posts: 23 Threads: 1 Thanked 1 Time in 1 Post Reputation: 11
C) 2:1

In healthy patient 2: 1 and for neoplasm 1: 1.5

 Tags Biochemistry-, Immunology-, Step-1-Questions

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