Rare Lipomatous Tumors with Osseous and/or Chondroid Differentiation in the Oral Cavity Report of Two Cases and Review of the Literature

Table 1

Immunohistochemistry findings of the 2 cases of oral lipoma with osseous/chondroid differentiation.

		S-100 𝛼	S-100 𝛽	EMA	MyoD1	FGF-1	VEGF	CD34	Ki-67(%)	RUNX-2	Sox-9
Chondrocyte		++	++	−	−	−	−	−	1.3	+∼−	+∼−
Osteocyte		−	−	−	−	−	−	−	1.4	−	−
Adipose cell		+	+	−	−	−	−	−	2.8	−	−
Endothelial cell		−	−	−	−	−	−	5.0 ± 3.6	3.4	−	−
Spindle cell	peripheral^∗	+	+	−	−	−	−	−	3.2	+	+
		(ch)	(ch)						(ch/os)	(os)	(ch)
	distant^∗∗	±∼−	+	−	±∼−	−	−	±∼−	3.3	−	±∼−

^∗peripheral spindle cells around osseous/chondroid tissue
^∗∗distant spindle cells inside myxoid area
ch:chondroid
os:osteoid.