Comparison of chromosomal patterns with clinical features in 165 lipomas: a report of the CHAMP study group

Cancer Genetics and Cytogenetics
H WillénRoberta Vanni

Abstract

Soft tissue lipomatous tumors are morphologically heterogeneous. Various morphologic features are associated with specific chromosomal patterns and clinical features such as age, sex, and tumor site, location, and size. Simple lipomas are known to be karyotypically heterogeneous, but this has not been correlated with clinicopathological features. In 165 cases of solitary soft tissue lipoma, short-term cultures were analyzed cytogenetically. The karyotypes were divided into the following groups: normal karyotype; 12q13-15 aberrations; 6p rearrangements; 13q rearrangements, 8q11-13 aberrations; ring or giant marker chromosomes or both; other aberrations. The tumors were reexamined morphologically without knowledge of the karyotypic or clinical data. An abnormal chromosomal pattern was observed in 129 of 165 cases (78%): in 75 of 90 (83%) lipomas in the extremities and in 43 of 63 (68%) trunk wall lipomas. Chromosomal aberrations were present in 69 of 90 (77%) subcutaneous tumors and in 59 of 64 (80%) deep tumors. A normal karyotype was twice as frequent in tumors in patients under 30 years of age than in those from older individuals (6 of 16 vs. 30 of 149, 40% resp. 20%). Apart from the finding that normal karyotypes were more co...Continue Reading

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