1p/19q Codeletion

**Semantic type:** Cell or Molecular Dysfunction

**Definition:** A chromosomal aberration where there is a loss of both the short arm of chromosome 1 and the long arm of chromosome 19. This chromosomal aberration is associated with oligodendroglial tumors.

**Synonyms:** - 1p/19q Co-deletion - 1p/19q co-deletion - Loss of Chromosomes 1p/19q - Positive - del(1p/19q)