25 October 2025
: Case report 
Intraosseous Cellular Schwannoma in the Infraorbital Region: A Rare Case
Unusual clinical course, Challenging differential diagnosis, Unusual setting of medical care, Rare disease
Edmundo Luis Rodrigues Pereira
BCD 1, Rebeca Viera Costa ABCDEFG 2, Jeovanna Brito de Moraes ACEF 3, Alessandra Arnaud Moreira ABD 2, Thayna Silva do Carmo Tavares ACE 2, Fabricio Passador-Santos BCD 4, Lucas Rodrigues Pinheiro CDE 5, Sérgio de Melo Alves Júnior ACDEF 2, João de Jesus Viana Pinheiro ACDEG 2*
DOI: 10.12659/AJCR.947024
Am J Case Rep 2025; 26:e947024
Figure 4 Histological images of the surgical specimen(A) Hematoxylin-eosin staining at 630× magnification showing sheets of spindle cells. Scale bar: 5 μm. (B) Hematoxylin-eosin staining at 630× magnification showing neoplastic cells arranged in sheets and bundles with a storiform pattern. Scale bar: 5 μm. (C) Immunohistochemical staining for Ki-67 shows nuclear positivity in proliferating cells (black arrowhead) at 400× magnification. Scale bar: 20 μm. (D) S-100 protein immunostaining demonstrates strong and diffuse cytoplasmic expression at 200× magnification. Scale bar: 20 μm.