Karyotypic and fluorescent in-situ hybridization study of the centromere of chromosome 7 in secondary myeloid neoplasms
Rev. bras. hematol. hemoter
; Rev. bras. hematol. hemoter;33(6): 425-431, Dec. 2011. ilus, tab
Article
em En
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| ID: lil-611378
Biblioteca responsável:
BR408.1
ABSTRACT
BACKGROUND:
Secondary myeloid neoplasms comprise a group of secondary diseases following exposure to myelotoxic agents or due to congenital diseases. The improvement of anticancer agents and immunosuppressive drugs seem to be associated with an increased incidence of secondary myeloid neoplasms. Karyotyping of bone marrow is essential for diagnosis and prognosis. Previous use of alkylating agents and radiation are associated with clonal abnormalities such as recurrent unbalanced -5/5q-, -7/7q- and complex karyotypes, whereas topoisomerase-II inhibitors lead to changes such as the balanced 11q23 rearrangement, t(8;21), t(15;17) and inv(16).OBJECTIVE:
To study the clinical and cytogenetic data of patients with secondary myeloid neoplasms who took antineoplastic and/or immunosuppressive drugs or progressed from aplastic anemia.METHODS:
The clinical and cytogenetic characteristics of 42 patients diagnosed with secondary myeloid neoplasms in one institution were retrospectively evaluated. Of these, 25, 11 and 6 patients had had oncological diseases, aplastic anemia and other diseases, respectively. Conventional cytogenetic and FISH analyses were performed for monosomy 7.RESULTS:
The cytogenetic study was conclusive in 32 cases with 84.4 percent of clonal abnormalities. Monosomy 7 and complex karyotypes were present in 44.4 percent and 37 percent, respectively. A high prevalence of unbalanced abnormalities (96.3 percent) was observed. Monosomy 7 was more prevalent in patients with myelodysplastic syndromes/myeloid neoplasms after aplastic anemia (66.6 percent). The median survival after diagnosis of myeloid neoplasms was only 5.7 months. Normal cytogenetics was associated to better survival (p-value = 0.03). There was a slightly worse trend of survival for patients with complex karyotypes (p-value = 0.057). Abnormal karyotype was an independent risk factor for poor survival (p-value = 0.012).CONCLUSION:
This study enhances the importance ...Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Síndromes Mielodisplásicas
/
Leucemia Mieloide Aguda
/
Segunda Neoplasia Primária
/
Cariotipagem
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
Rev. bras. hematol. hemoter
Assunto da revista:
HEMATOLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Brasil