01 February 2026
: Case report 
Subcutaneous Solitary Fibrous Tumor in the Chin of a Young Adult: A Diagnostic Challenge
Challenging differential diagnosis, Rare disease
Gantuya Purevjav ABCF 1, Ai Koyanagi BCDF 2, Balazs Miklos Sandor DEF 3,4, Nyamzaya Molomdalai DF 5, Akinari Kakumoto CDF 2, Tsengelmaa Jamiyan
ACDEF 6*
DOI: 10.12659/AJCR.950318
Am J Case Rep 2026; 27:e950318
Figure 2 Immunohistochemical profile of a solitary fibrous tumor(A–C) Strong and diffuse positivity for CD99 (A), B-cell lymphoma-2 (Bcl-2, B), and smooth muscle actin (SMA, C) (immunohistochemistry [IHC], ×400, scale bar=50 μm). (D) H-caldesmon shows focal positivity (IHC, ×400, scale bar=50 μm). (E, F) CD34 (E) and S100 (F) staining results are negative (IHC, ×400, scale bar=50 μm).