Rearrangement of 9p13 as the primary chromosomal aberration in adenoid cystic carcinoma of the respiratory tract

✍ Scribed by Koichiro Higashi; Yuesheng Jin; Maria Johansson; Dr. Sverre Heim; Nils Mandahl; Anders Biörklund; Johan Wennerberg; Göran Hambraeus; Leif Johansson; Felix Mitelman

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 638 KB
• Volume: 3
• Category: Article
• ISSN: 1045-2257
• DOI: 10.1002/gcc.2870030105

✦ Synopsis

Two adenoid cystic carcinomas, one of the nasal cavity, the other a bronchial tumor, were cytogenetically analyzed. The former had a t(6;9)(q21-22;pl3-21) as the sole karyotypic abnormality. The latter had two related abnormal clones, resulting in the mosaic karyotype 46,XY,t(9; I7)(p I 3;p I 3)/46,Y,t(X;6)(~22;q23)~(9; I7)(p I 3;p I 3). The karyotypic profiles of the two cases, the only respiratory tract adenoid cystic carcinomas that have been cytogenetically characterized, differ little from those of previously reported adenoid cystic carcinomas of the major salivary glands, underscoring the fundamental biologic similarity among these tumors even when they develop from different structures and in different anatomical sites and organs. Because in the second case the t(9; 17) obviously must have preceded the t(X6), we conclude that both tumors had rearrangement of 9p13 as the primary cytogenetic change. The data thus add t o the evidence that 6q changes are frequent, albeit at least sometimes secondary, aberrations in malignant salivary gland tumors. A subset of adenoid cystic carcinomas instead have rearrangement of 9p as the primary, and presumably pathogenetically essential, abnormality.