A fibroadenoma with a t(4;12) (q27;q15) affecting the HMGI-C gene, a member of the high mobility group protein gene family

Breast Cancer Res Treat. 1996;38(3):299-303. doi: 10.1007/BF01806149.


An intracanalicular fibroadenoma of the breast showing a clonal chromosomal aberration t(4;12) (q27;q15) as the sole cytogenetic abnormality is described. In order to narrow down the breakpoint region on chromosome 12 on the molecular level we performed fluorescence in situ hybridization (FISH) analysis with a cosmid pool originating from a YAC-contig overspanning part of the region 12q14-15. We were able to narrow down the breakpoint to an approximately 230kb fragment belonging to the HMGI-C gene which maps within an area recently designated as MAR (Multiple Aberration Region). The chromosomal breakpoints of other frequent benign solid tumors, i.e. lipomas, uterine leiomyomas, and pleomorphic adenomas are clustered within the third intron of that gene.

Publication types

  • Case Reports

MeSH terms

  • Adolescent
  • Breast Neoplasms / genetics*
  • Breast Neoplasms / ultrastructure
  • Chromosomes, Human, Pair 12 / genetics*
  • Chromosomes, Human, Pair 4 / genetics*
  • Female
  • Fibroadenoma / genetics*
  • Fibroadenoma / ultrastructure
  • HMGA2 Protein
  • High Mobility Group Proteins / genetics*
  • Humans
  • In Situ Hybridization, Fluorescence
  • Translocation, Genetic*


  • HMGA2 Protein
  • High Mobility Group Proteins