CASE HISTORY / CLINIC:
Patient who has had many operations of the paranasal sinuses (especially of the right frontal sinus) presenting with right frontal pains that have been existing for two weeks, swelling above the right eye that is partially painful upon palpation, edematous right upper eyelid.


FINDINGS:
The coronal CT scans (bony window) demonstrate a total radio-opacity of the right frontal sinus. The margin of the right orbita is partially discontinuous, the soft-tissue opacity extends right up to the right orbital cone . The right right eye ball has been displaced laterally.
Side finding: polypoid swelling of the mucous membrane of the left frontal sinus.


DIAGNOSIS:
Large mucocele in the right frontal sinus that extends into the orbita, displacing the eyeball laterally.


DIFFERENTIAL DIAGNOSIS:
Other benign masses.



Suggestions for further reading:

1) Amersham Health
2) Roche Lexikon Medizin
3) Pathologie Online
4) RWTH Aachen