Figure 3. Histologic features of cellular EHs harboring FOS-VIM fusion.
(A) The intraosseous cellular EH (case #2) extended to the skin and showed a distinctive lobulated growth. (B) Higher magnification demonstrated solid sheets with scattered vascular channels. (C) Transition between central solid growth and peripheral maturation into well-formed vascular structures was identified (case #3). (D) VIM break-apart signals by FISH assay (case#2).
