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Special
Stains
Description
Special stains may be performed, in addition to a routine chromosome
analysis, when a chromosome abnormality is discovered that requires
further examination to more definitively describe the aberration.
Special stains may include C-banding, Q-banding, NOR, or DAPI. The
particular stain(s) depends upon the chromosome abnormality. Special
stains are performed at the discretion of the cytogenetic laboratory
director.
Indications
Structural chromosome rearrangements such as translocations, inversions,
rings, or marker chromosomes.
Specimen Requirements
Special stains are performed on chromosome spreads that have already
been prepared from a submitted specimen. Usually no further specimen
is required.
Reference Value
46,XX or 46,XY
Turn Around Time
Depends upon the type of specimen. May increase the usual turn around
time by one or two days.
CPT Codes
88283 - special banding
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