# Familial 22q11.2 Duplication/Deletion Syndrome: A Testament to the Long‐Standing Clinical Utility of FISH

## TL;DR

This paper discusses the importance of using FISH for diagnosing 22q copy number disorders when there is a family history of such conditions.

## Contribution

The paper emphasizes the clinical utility of FISH in recurrence risk assessment for 22q11.2 duplication/deletion syndrome.

## Key findings

- FISH can accurately localize allelic copy number in cases with family history of 22q11.2 disorders.
- Chromosomal microarray is standard, but FISH is crucial for recurrence risk assessment.

## Abstract

While the standard diagnostic test for suspected 22q copy number disorders is by chromosomal microarray, this case highlights the importance of utilizing FISH to localize allelic copy number when there is a family history of deletion/duplication syndrome for accurate recurrence risk assessment.