![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Jedyne_w_Polsce_bli%25C5%25BAniaki_z_zespo%25C5%2582em_mikrodelecji_22q11.jpg/640px-Jedyne_w_Polsce_bli%25C5%25BAniaki_z_zespo%25C5%2582em_mikrodelecji_22q11.jpg&w=640&q=50)
Microdeletion syndrome
Syndrome caused by chromosomal deletion / From Wikipedia, the free encyclopedia
A microdeletion syndrome is a syndrome caused by a chromosomal deletion smaller than 5 million base pairs (5 Mb) spanning several genes that is too small to be detected by conventional cytogenetic methods or high resolution karyotyping (2–5 Mb).[1][2] Detection is done by fluorescence in situ hybridization (FISH). Larger chromosomal deletion syndromes are detectable using karyotyping techniques.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Jedyne_w_Polsce_bli%C5%BAniaki_z_zespo%C5%82em_mikrodelecji_22q11.jpg/640px-Jedyne_w_Polsce_bli%C5%BAniaki_z_zespo%C5%82em_mikrodelecji_22q11.jpg)