84922-4
LaboratoryCells.chromosome 7 monosomy/Cells counted in Blood or Tissue by FISH
Definition
The percent of cells in blood or tissue containing a single copy of chromosome 7 (monosomy 7) can be detected by FISH based on the number of chromosome 7 probe signals and used for the diagnosis of acute myeloid leukemia or myelodysplastic syndrome. This term is used to report the number of cells that have a chromosome 7 deletion out of total number of cells examined (e.g. 80 out of 100 cells, or 80%). Results are also typically reported in ISCN (International System for Human Cytogenetic Nomenclature) format [LOINC: 62356-1]. This term is based, but not limited in use to, the Vysis LSI D7S486(7q31)/CEP 7(7p11.1-q11.1) probe kit. To report percentage results for the 7q31 (D7S486) probe deletion, used [LOINC: 84921-6].
LOINC 6-Axis Classification
Component
Cells.chromosome 7 monosomy/Cells counted
Property
NFr
Time Aspect
Pt
System
Bld/Tiss
Scale Type
Qn
Method Type
FISH
Details
Class
MOLPATH.DELDUP
Order/Observation
Both
Short Name
Cells.Chr Mono 7/Cells NFr Bld/T FISH
Display Name
Cells.chromosome 7 monosomy/Cells counted FISH (Bld/Tiss)
Related Names
Frequently Asked Questions
What is LOINC code 84922-4?
LOINC code 84922-4 identifies "Cells.chromosome 7 monosomy/Cells counted in Blood or Tissue by FISH". The percent of cells in blood or tissue containing a single copy of chromosome 7 (monosomy 7) can be detected by FISH based on the number of chromosome 7 probe signals and used for the diagnosis of acute myeloid leukemia or myelodysplastic syndrome. This term is used to report the number of cells that have a chromosome 7 deletion out of total number of cells examined (e.g. 80 out of 100 cells, or 80%). Results are also typically reported in ISCN (International System for Human Cytogenetic Nomenclature) format [LOINC: 62356-1]. This term is based, but not limited in use to, the Vysis LSI D7S486(7q31)/CEP 7(7p11.1-q11.1) probe kit. To report percentage results for the 7q31 (D7S486) probe deletion, used [LOINC: 84921-6].
What does 84922-4 measure?
This code measures Cells.chromosome 7 monosomy/Cells counted in Bld/Tiss. It belongs to the MOLPATH.DELDUP class in the LOINC classification.
What is LOINC?
LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.