| Full text | |
| Author(s): |
Bellucco, Fernanda T.
[1]
;
Fock, Rodrigo A.
[1]
;
de Oliveira-Junior, Helio R.
[1]
;
Perez, Ana B.
[1]
;
Melaragno, Maria I.
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Fed Sao Paulo, Dept Morphol & Genet, Rua Botucatu 740, BR-04023900 Sao Paulo, SP - Brazil
Total Affiliations: 1
|
| Document type: | Review article |
| Source: | Cytogenetic and Genome Research; v. 156, n. 4, p. 173-178, 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
Complex small marker chromosomes (sSMCs) consist of chromosomal material derived from more than 1 chromosome. Complex sSMCs derived from chromosomes 4 and 21 are rare, with only 7 cases reported. Here, we describe a patient who presented with a complex sSMC derived from a maternal translocation between chromosomes 4 and 21, which was revealed by G-banding, MLPA, and array techniques. The marker chromosome der(21)t(4; 21)(q32.1; q21.2) mat is composed of a 25.6-Mb 21pterq21.2 duplication and a 32.1-Mb 4q32.1q35.2 duplication. In comparison to patients with sSMCs derived from chromosomes 4 and 21, our patient showed a similar phenotype with neuropsychomotor developmental delay and facial dysmorphism as the most important finding, being a composition of the findings found in pure 4q and 21q duplications. The wide range of phenotypes associated with sSMCs emphasizes the importance of detailed cytogenomic analyses for an accurate diagnosis, prognosis, and genetic counseling. (C) 2018 S. Karger AG, Basel (AU) | |
| FAPESP's process: | 14/11572-8 - Chromosomal rearrangements and their relevance in the etiology of genetic disorders: cytogenomic and molecular investigation |
| Grantee: | Maria Isabel de Souza Aranha Melaragno |
| Support Opportunities: | Research Projects - Thematic Grants |