i(17q)

**Semantic type:** Cell or Molecular Dysfunction

**Definition:** A cytogenetic abnormality involving chromosome 17 that results from loss of the short arm and duplication of the long arm. This aberration is associated with a variety of neoplastic diseases, and is indicative of a poor prognosis for individuals with hematologic malignancies.

**Synonyms:** - Isochromosome 17q