"Fat-rich" (Spindle Cell-poor) Variants of Atypical Spindle Cell Lipomatous Tumors Show Similar Morphologic, Immunohistochemical and Molecular Features as "Dysplastic Lipomas" Are They Related Lesions?. (February 2019) - Michal, Michael; Agaimy, Abbas; Luiña Contreras, Alejandro; Michal, Michal; Fetsch, John F.