MDM2 Gene Copy Number/Chromosome 12 Copy Number in Tissue by FISH

**Semantic type:** Laboratory Procedure

**Definition:** A quantitative fluorescent in situ hybridization-based procedure that measures the number of copies of the MDM2 gene per the number of copies of chromosome 12 in a tissue specimen.

**Synonyms:** - MDM2 gene copy number/Chromosome 12 copy number in Tissue by FISH