B. Dadone, S. Refae, C. Lemarié-delaunay, L. Bianchini, and F. Pedeutour, Molecular cytogenetics of pediatric adipocytic tumors, Cancer Genet, vol.208, issue.10, pp.469-481, 2015.

A. P. Dei-tos, F. Pedeutour, D. M. Fletcher, J. A. Bridge, and P. Hogendoorn, Atypical lipomatous tumour, WHO Classification of Tumours of Soft Tissue and, pp.33-39, 2013.

R. Peng, H. Chen, and X. Yang, A novel sclerosing atypical lipomatous tumor/welldifferentiated liposarcoma in a 7-year-old girl: report of a case with molecular confirmation, Hum Pathol, vol.71, pp.41-46, 2018.

C. Kuhnen, T. Mentzel, A. Fisseler-eckhoff, M. Debiec-rychter, and R. Sciot, Atypical lipomatous tumor in a 14-year-old patient: distinction from lipoblastoma using FISH analysis, Virchows Arch Int J Pathol, vol.441, issue.3, pp.299-302, 2002.

S. Okamoto, R. Machinami, T. Tanizawa, S. Matsumoto, G. Lee et al.,

, Dedifferentiated liposarcoma with rhabdomyoblastic differentiation in an 8-year-old girl, Pathol Res Pract, vol.206, issue.3, pp.191-196, 2010.

W. W. Huh, C. Yuen, and M. Munsell, Liposarcoma in children and young adults: a multiinstitutional experience, Pediatr Blood Cancer, vol.57, issue.7, pp.1142-1146, 2011.

R. Alaggio, C. M. Coffin, and S. W. Weiss, Liposarcomas in young patients: a study of 82 cases occurring in patients younger than 22 years of age, Am J Surg Pathol, vol.33, issue.5, pp.645-658, 2009.

L. V. Debelenko, A. R. Perez-atayde, and S. G. Dubois, p53+/mdm2-atypical lipomatous tumor/well-differentiated liposarcoma in young children: an early expression of Li-Fraumeni syndrome, Pediatr Dev Pathol Off J Soc Pediatr Pathol Paediatr Pathol Soc, vol.13, issue.3, pp.218-224, 2010.

E. J. Stanelle, E. R. Christison-lagay, and E. L. Sidebotham, Prognostic factors and survival in pediatric and adolescent liposarcoma, Sarcoma, p.870910, 2012.

H. P. Hahn and C. Fletcher, Primary mediastinal liposarcoma: clinicopathologic analysis of 24 cases, Am J Surg Pathol, vol.31, issue.12, pp.1868-1874, 2007.

J. M. Boland, T. V. Colby, and A. L. Folpe, Liposarcomas of the mediastinum and thorax: a clinicopathologic and molecular cytogenetic study of 24 cases, emphasizing unusual and diverse histologic features, Am J Surg Pathol, vol.36, issue.9, pp.1395-1403, 2012.

J. Mcgowan-jordan, A. Simons, and M. Schmid, An International System for Human Cytogenomic Nomenclature, 2016.

A. P. Dei-tos, A. Marino-enriquez, F. Pedeutour, S. Rossi, . Dedifferentiated et al., WHO Classification of Tumours of Soft Tissue and Bone, pp.37-38

N. Mandahl, L. Magnusson, and J. Nilsson, Scattered genomic amplification in dedifferentiated liposarcoma, Mol Cytogenet, vol.10, p.25, 2017.

, Mitelman Database of Chromosome Aberrations and Gene Fusions in Cancer, 2019.

M. D. Bassett, S. M. Schuetze, and C. Disteche, Deep-seated, well differentiated lipomatous tumors of the chest wall and extremities: the role of cytogenetics in classification and prognostication, Cancer, vol.103, issue.2, pp.409-416, 2005.

D. Gisselsson, M. Höglund, and F. Mertens, The structure and dynamics of ring chromosomes in human neoplastic and non-neoplastic cells, Hum Genet, vol.104, issue.4, pp.315-325, 1999.

C. Sreekantaiah, C. P. Karakousis, S. P. Leong, and A. A. Sandberg, Cytogenetic findings in liposarcoma correlate with histopathologic subtypes, Cancer, vol.69, issue.10, pp.2484-2495, 1992.

G. Sozzi, F. Minoletti, and M. Miozzo, Relevance of cytogenetic and fluorescent in situ hybridization analyses in the clinical assessment of soft tissue sarcoma, Hum Pathol, vol.28, issue.2, pp.134-142, 1997.

S. Pilotti, D. Torre, G. Mezzelani, and A. , The expression of MDM2/CDK4 gene product in the differential diagnosis of well differentiated liposarcoma and large deep-seated lipoma, Br J Cancer, vol.82, issue.7, pp.1271-1275, 2000.

F. Pedeutour, R. F. Suijkerbuijk, and A. Forus, Complex composition and coamplification of SAS and MDM2 in ring and giant rod marker chromosomes in welldifferentiated liposarcoma, Genes Chromosomes Cancer, vol.10, issue.2, pp.85-94, 1994.

P. Dal-cin, P. Kools, and R. Sciot, Cytogenetic and fluorescence in situ hybridization investigation of ring chromosomes characterizing a specific pathologic subgroup of adipose tissue tumors, Cancer Genet Cytogenet, vol.68, issue.2, pp.85-90, 1993.

M. Nilsson, L. A. Meza-zepeda, F. Mertens, A. Forus, O. Myklebost et al., Amplification of chromosome 1 sequences in lipomatous tumors and other sarcomas, Int J Cancer, vol.109, issue.3, pp.363-369, 2004.

C. T. Storlazzi, A. Lonoce, and M. C. Guastadisegni, Gene amplification as double minutes or homogeneously staining regions in solid tumors: origin and structure, Genome Res, vol.20, issue.9, pp.1198-1206, 2010.

K. M. Turner, V. Deshpande, and D. Beyter, Tumorigenic potential associated with enhanced expression of a gene that is amplified in a mouse tumor cell line, Nature, vol.543, issue.7643, pp.1565-1569, 1991.

D. W. Garsed, O. J. Marshall, and V. Corbin, The architecture and evolution of cancer neochromosomes, Cancer Cell, vol.26, issue.5, pp.653-667, 2014.

F. Pedeutour, A. Forus, and J. M. Coindre, Structure of the supernumerary ring and giant rod chromosomes in adipose tissue tumors, Genes Chromosomes Cancer, vol.24, issue.1, pp.30-41, 1999.

N. Sirvent, A. Forus, and W. Lescaut, Characterization of centromere alterations in liposarcomas, Genes Chromosomes Cancer, vol.29, issue.2, pp.117-129, 2000.

P. H. Rao, V. V. Murty, D. C. Louie, and R. S. Chaganti, Nonsyntenic amplification of MYC with CDK4 and MDM2 in a malignant mixed tumor of salivary gland, Cancer Genet Cytogenet, vol.105, issue.2, pp.160-163, 1998.

R. Corvi, L. Savelyeva, L. Amler, R. Handgretinger, and M. Schwab, Cytogenetic evolution of MYCN and MDM2 amplification in the neuroblastoma LS tumour and its cell line, Eur J Cancer Oxf Engl, vol.31, issue.4, pp.520-523, 1990.

G. M. Wahl, The importance of circular DNA in mammalian gene amplification, Cancer Res, vol.49, issue.6, pp.1333-1340, 1989.

G. R. Stark, Regulation and mechanisms of mammalian gene amplification, Adv Cancer Res, vol.61, pp.87-113, 1993.

P. J. Stephens, C. D. Greenman, and B. Fu, Massive genomic rearrangement acquired in a single catastrophic event during cancer development, Cell, vol.144, issue.1, pp.27-40, 2011.

A. Rode, K. K. Maass, K. V. Willmund, P. Lichter, and A. Ernst, Chromothripsis in cancer cells: An update, Int J Cancer, vol.138, issue.10, pp.2322-2333, 2016.

C. Zhang, M. L. Leibowitz, and D. Pellman, Chromothripsis and beyond: rapid genome evolution from complex chromosomal rearrangements, Genes Dev, vol.27, issue.23, pp.2513-2530, 2013.

M. Fukumoto, A. Suzuki, and J. Inazawa, Chromosomal location and structure of amplicons in two human cell lines with coamplification of c-myc and Ki-ras oncogenes, Somat Cell Mol Genet, vol.19, issue.1, pp.21-28, 1993.