期刊
HUMAN PATHOLOGY
卷 65, 期 -, 页码 140-146出版社
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.humpath.2017.05.006
关键词
Soft tissues; Spindle cell; Pleomorphic lipoma; Liposarcoma; Lipoblasts
类别
资金
- National Sustainability Program I (NPU I) by the Ministry of Education Youth and Sports of the Czech Republic [LO1503]
The presence and frequency of lipoblasts (LPB) in spindle cell lipomas (SCL) and pleomorphic lipomas (PL) has never been studied in detail on a histologically, immunohistochernically and molecular genetically validated set of tumors. The authors investigated this feature by reviewing 91 cases of SCL and 38 PL. When more than 3 unequivocal LPB were found, the case was regarded as positive for the presence of LPB. All positive cases were then stained with CD34 and retinoblastoma (Rb) protein antibodies and tested by fluorescence in situ hybridization for MDM2 and CDK4 amplifications and the FUS gene rearrangements. The patients with SCL and PL containing LPB were 14 women and 47 men, the rest were of unknown gender. The cases usually presented as superficial, well-circumscribed soft tissue masses and most commonly occurred in the upper back and neck. CD34 was expressed in all cases, while Rb protein was consistently absent in all. Molecular genetic results, when available, were in concordance with the morphological diagnosis of SCL/PL. LPB were found in 37 (41%) cases of SCL and 25 cases of PL (66%). While in many cases they are inconspicuous, in some others they constitute a very prominent component of the tumor. It is important to be aware of this fact in order to avoid misinterpretation as liposarcoma. (C) 2017 Elsevier Inc. All rights reserved.
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