Lipoblasts in spindle cell and pleomorphic lipomas: a close scrutiny. Hum Pathol 2017 Jul;65:140-146
Date
05/27/2017Pubmed ID
28546131DOI
10.1016/j.humpath.2017.05.006Scopus ID
2-s2.0-85019098344 (requires institutional sign-in at Scopus site) 30 CitationsAbstract
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, immunohistochemically 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.
Author List
Michal M, Kazakov DV, Hadravsky L, Michalova K, Grossmann P, Steiner P, Vanecek T, Renda V, Suster S, Michal MMESH terms used to index this publication - Major topics in bold
Adipose TissueAdult
Aged
Aged, 80 and over
Biomarkers, Tumor
Diagnosis, Differential
Female
Gene Amplification
Gene Rearrangement
Humans
Immunohistochemistry
In Situ Hybridization, Fluorescence
Lipoma
Liposarcoma
Male
Middle Aged
Predictive Value of Tests
