IgVH Mutation Analysis 
Methodology Molecular 
Test Name IgVH Mutation Analysis 
Test Description RT-PCR and bi-directional sequencing of the variable region of the immunoglobulin heavy chain for detection of mutation from germline sequence. The mutated VH gene family is identified in positive reports (>3% sequence deviation). Mutation may not be detectable in specimens containing <10% clonal B-cells.  
Clinical Significance IgVH mutation is a significant prognostic marker in chronic lymphocytic leukemia (CLL). IgVH mutation analysis combined with FISH, ZAP-70, and beta-2 microglobulin measurement provide comprehensive prognostic assessment and may be used to determine the approach to therapy for all CLL patients.  
Specimen Requirements
  • Peripheral blood: 5 mL in EDTA tube.
  • Bone marrow: 2 mL in EDTA tube.
 
Storage and Transportation Use cold pack for transport, making sure cold pack is not in direct contact with specimen. Ship same day as drawn whenever possible; specimens <72 hours old preferred. 
Turn Around Time (TAT) 10 days  
CPT Codes AMA 2013: 81263