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Cytogenetic findings in 14 benign cartilaginous neoplasms

2011; Elsevier BV; Volume: 204; Issue: 4 Linguagem: Inglês

10.1016/j.cancergen.2011.02.004

2210-7770

Nilo Sakai, Kikue Terada Abe, Lia Menezes Formigli, Marcio Fernandes Pereira, Maria Dulce Valverde de Oliveira, Déborah Afonso Cornélio, Alessandra de La Roque Ferreira, Ricardo K. Kalil,

Cancer-related molecular mechanisms research

Benign cartilaginous tumors represent a spectrum of neoplastic processes with variable clinical and pathologic presentations. These tumors are histologically characterized by the presence of chondrocytes surrounded by a cartilaginous matrix. Few studies describe karyotypic abnormalities in these benign lesions. We report a series of 14 chondromas from a single institution. Conventional cytogenetics was performed on short term cultures from all cases. Clonal chromosome aberrations were found in nine tumors. One soft tissue chondroma contained three clones with t(6;12)(q12;p11.2), t(3;7)(q13;p12), and der(2)t(2;18)(p11.2;q11.2). Three periosteal chondromas displayed random structural aberrations of chromosomes 2, 3, 6, 7, and 11 and loss of chromosome 13. Among the enchondromas, three tumors displayed chromosome losses, one contained a complex translocation involving chromosomes 12, 15, and 21 as well as an inv(2)(p21q31),t(12;15;21)(q13;q14;q22) and a separate enchondroma showed a translocation involving chromosomes 12 and 22. Our data suggest that considerable cytogenetic heterogeneity exists among benign chondromatous tumors.