Central giant cell lesion (CGCL) and peripheral giant cell lesion (PGCL) are
non-neoplastic proliferative processes of the jaws. PGCL is a reactive process
induced by irritant local factors and CGCL is an intra-osseous lesion of unknown
etiology. Both lesions exhibit similar histologic features showing abundant
mononuclear cells, admixed with a large number of multinucleated giant cells and a
rich vascularized stroma with extravasated erythrocytes, hemosiderin deposition, and
blood-filled pools. Recent studies have linked fatty acid synthase (FASN) with
angiogenesis.Objective To evaluate angiogenesis and lymphangiogenesis and their relationship with FASN
expression in CGCL and PGCL. Material and Methods Thirteen CGCL and 14 PGCL of the jaws were selected for immunoexpression of FASN;
CD34 and CD105 (to assess blood microvessel density [MVD] and
microvessel area [MVA]); and D2-40 (to assess lymphatic MVD and
MVA). Results Within PGCL and CGCL, MVD-CD34 was signifcantly higher than MVD-CD10S, followed
by MVD-D2-40. Moreover, a signifcantly higher number of FASN-positive
multinucleated giant cells than mononuclear cells were observed. Between PGCL and
CGCL, only MVD-CD34 and all MVA were signifcantly higher in PGCL. Positive
correlation between MVA-CD10S with FASNpositive mononuclear cells in both lesions
was observed. Conclusions Our results show both lesions exhibiting similar levels of FASN expression and
neoangiogenesis, suggesting constitutive processes that regulate tissue
maintenance.