Reciprocal translocations in myelodysplastic syndromes and chronic myelomonocytic leukemias: review of 5,654 patients with an evaluable karyotype.

Autores de IIS La Fe

• José Vicente Cervera Zamora

  Autor

• Esperanza Such Taboada

  Autor

• Guillermo Sanz Santillana

  Autor

• Jordi Grau Hernandez

  Autor

Participantes ajenos a IIS La Fe

• Costa D
• Muñoz C
• Carrió A
• Nomdedeu M
• Calvo X
• Solé F
• Luño E
• Vallespí T
• Berneaga D
• Gómez C
• Arias A
• Insunza A
• Calasanz MJ
• Ardañaz MT
• Hernández JM
• Azaceta G
• Álvarez S
• Sánchez J
• Martín ML
• Bargay J
• Gómez V
• Cervero CJ
• Allegue MJ
• Collado R
• Campo E
• Nomdedeu B
• Spanish Group of Myelodysplastic Syndromes (GESMD)

Grupos

• Hematología y Hemoterapia

Abstract

The infrequency of translocations in myelodysplastic syndromes (MDS) and chronic myelomonocytic leukemias (CMML) makes their identification and reporting interesting for the recognition of the recurrent ones and the genes involved in these neoplasias. The aims of this study were to identify new translocations associated with MDS and CMML and to establish their frequency in a cohort of 8,016 patients from the Spanish Group of MDS database. The karyotype was evaluable in 5,654 (70%) patients. Among those, 2,014 (36%) had chromosomal abnormalities, including 213 (10%) translocations identified in 195 patients. The translocations were balanced in 183 (86%) cases and unbalanced in 30 (14%) cases. All chromosomes were found to be involved in translocations, with the single exception of the Y chromosome. The chromosomes most frequently involved were in decreasing frequency: 3, 1, 7, 2, 11, 5, 12, 6, and 17. Translocations were found in karyotypes as the unique chromosomal abnormality (33%), associated with another chromosomal abnormality (11%), as a part of a complex karyotype (17%), and as a part of a monosomal karyotype (38%). There were 155 translocations not previously described in MDS or CMML and nine of them appeared to be recurrent.