Sorted By Test Name - Mayo Medical Laboratories

FBUCC
8668
FXIST
88538
Interpretation: Detection of IgE antibodies in serum (Class 1 or greater) indicates an increased
likelihood of allergic disease as opposed to other etiologies and defines the allergens that may be
responsible for eliciting signs and symptoms. The level of IgE antibodies in serum varies directly with the
concentration of IgE antibodies expressed as a class score or kU/L.
Reference Values:
Class IgE kU/L Interpretation
0 Negative
1 0.35-0.69 Equivocal
2 0.70-3.49 Positive
3 3.50-17.4 Positive
4 17.5-49.9 Strongly positive
5 50.0-99.9 Strongly positive
6 > or =100 Strongly positive Reference values
apply to all ages.
Clinical References: Homburger HA: Allergic diseases. In Clinical Diagnosis and Management by
Laboratory Methods. 21st edition. Edited by RA McPherson, MR Pincus. New York, WB Saunders
Company, 2007, Chapter 53, Part VI, pp 961-971
X and Y Aneuploidy Detection, Buccal Smear, FISH
Clinical Information: Aneuploidy of the sex chromosomes is common among recognized congenital
syndromes. For example, the majority (80%) of individuals with Klinefelter syndrome have 2 X
chromosomes and 1 Y chromosome; the remainder are mosaics or variants. Individuals with Turner
syndrome have a single X chromosome in 55% of cases; the remaining 45% are either variants or
mosaics.
Useful For: As a supplement to conventional cytogenetic analysis in patients with normal or uncertain
cytogenetic results for sex chromosome aneuploidy or when an alternative tissue needs to be studied To
screen individuals suspected of having sex chromosome aneuploidy As a means to rapidly determine the
sex chromosome complement
Interpretation: Specimens that contain >5% cells with a signal pattern other than XX in females and
XY in males have a very high likelihood of having a clone of cells with an abnormal complement of sex
chromosomes. Specimens with