What is cytogenetic testing: fluorescent in situ hybridization testing?

Also known as: FISH testing, congenital blood test, cytogenetic testing.

The FISH (fluorescent in situ hybridization) test is a blood test that “maps” the genetic material in a child’s cells looking for gene abnormalities which can give rise to developmental delays, autism, mental retardation and other rare genetic disorders that sometimes occur at birth.

Reviewed by: Jack Wolfsdorf, MD, FAAP

This page was last updated on: 1/29/2019 3:21:13 PM

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