PMC2809435_01
CT scan of the lesion. The lesion can be seen on the right 
side of tongue base.
IJOL2009-515068.001.jpg
PMC2809435_01_IJOL2009-515068.001.jpg
fig1
A computed tomography was performed and a possible granulomatous or inflammatory mass with calcification was reported (Figure 1).
En bloc excision of well-circumscribed mass in the tongue 
base. M: mentum.
IJOL2009-515068.002.jpg
PMC2809435_01_IJOL2009-515068.002.jpg
fig2
(a) Closer view of
amorphous, fibrillary matrix deposition (hematoxylin and eosin, x20). (b) Peach-red staining of the material in Congo-red
staining (Congo-red, x20). (c) Apple-green
birefringence under polarized light (Congo-red, polarization microscope, x20). (d) Amyloid deposition in vessel
walls (Congo-red, x20).
IJOL2009-515068.003.jpg
PMC2809435_01_IJOL2009-515068.003.jpg
fig3
AA-Congo (AAC) (Dako, Denmark 1/100 dilution) revealed a non-AA-type amyloid deposition (Figure 3).
(a) Osseous metaplasia observed adjacent to amyloid deposition. 
Note the single chondrocytes spread in amyloid matrix (asterix) (hematoxlin 
eosin, x10). (b) Areas presenting extensive chondroid
metaplasia (hematoxlin eosin, x10).
IJOL2009-515068.004.jpg
PMC2809435_01_IJOL2009-515068.004.jpg
fig4
Focal chondroid differentiation was also observed either neighboring the osseous tissue or spread as single chondrocytes in the amyloid matrix (Figure 4).