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Updated: Jun 5, 2026

Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
B-acute lymphoblastic leukemia and cystinuria in a patient with duplication 22q11.21 detected by chromosomal
Vivian Y Chang1, Fabiola Quintero-Rivera, Erin E Baldwin
1Division of Hematology-Oncology, David Geffen School of Medicine, University of California, Los Angeles, California, USA. vchang@mednet.ucla.edu
Abstract:
Duplication 22q11.2 syndrome is the result of a microduplication of the same chromosomal region that is deleted in DiGeorge and Velocardiofacial syndromes. We describe a patient with dysmorphic features who was diagnosed with pre-B acute lymphoblastic leukemia, and developed cystinuria and pancreatitis during treatment. Duplication 22q11.2 has not been previously described in association with hematologic abnormalities. Chromosomal microarray technology was used to diagnose duplication 22q11.2 syndrome. In this era of advanced genomics, this technology has become an important method for helping to determine the molecular basis of diseases, best treatments and ultimately patient outcomes.
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