PMC3336232_01
Axial high-resolution CT scan showing the retroauricular fistula (white arrow), sclerotic mastoid and granulation tissue in the middle ear area (black arrow).
CRIM.ID2011-932608.001.jpg
PMC3336232_01_CRIM.ID2011-932608.001.jpg
fig1
CT scan of temporal bones showed the signs of the previous surgery, as well as inflammatory tissue in the right external auditory canal, the middle ear and mastoid (Figure 1). 
Granulomatous inflammation, Langhans cells, and caseation necrosis (100x).
CRIM.ID2011-932608.002.jpg
PMC3336232_01_CRIM.ID2011-932608.002.jpg
fig2
TBC, allowed to exclude a secondary TBC form. The histological examination of the granulation tissue showed caseous necrosis and specific granulation with epithelioid cells and Langhans type giant cells (Figure 2). 