PMC7103030_01
Scan of the left temporal bone in axial section, bone window. (a) Extensive lytic lesions (arrow). (b) Complete regression of the lytic lesions after treatment.
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fig1
The facial and temporal bones CT-scan revealed a lytic lesion of the horizontal branch of the right mandible and a significant lytic lesion of the left petrous bone, extended to the squama (Figure 1(a)). The control temporal bones CT-scan showed complete regression of the lytic lesion (Figure 1(b)).
Granulomas of tumor histiocytes with an oval nucleus centered by a small nucleolus; their cytoplasm is weakly eosinophilic.
CRIE2020-6284764.002.jpg
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fig2
The immunohistochemistry study was performed, and it revealed a strong positivity of histiocytes for the CD1 antigen and the S100 protein (Figure 2).