PMC5110863_01
Precontrast axial CT scan shows a large round expansile mass hypoattenuating to the facial muscles and centered in the right maxillary sinus with plenty of calcifications.
CRIM2016-2786030.001.jpg
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fig1
Unenhanced CT images revealed a round (diameter = 42 mm) expansive soft-tissue mass with stellate-shaped calcification which originated from the right maxillary sinus, invaded into ethmoid sinus, sphenoid sinus region, and forepart of the right nasopharynx and oropharynx, and prolapsed into ipsilateral nasal cavity, pressuring and remodeling the adjacent bony wall of maxilla, nasal septum, and sphenoid bone with most bony margins preserved and without teeth being involved (Figure 1).
Postcontrast axial CT scan shows various portions of little enhancement within a marked heterogeneous enhancement mass and weaker intensity compared to the facial muscles.
CRIM2016-2786030.002.jpg
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fig2
The postcontrast axial CT scan showed marked heterogeneous enhancement (Figure 2):significant enhancement (104 HU) surrounding the calcification except posterior and left part (42 HU) of the tumor, nowhere without enhancement:compared to the CT scan without contrast agent (32-50 HU).