CASE HISTORY / CLINIC:
66-year-old female coming for a follow-up examination after an operation of a cranial base tumor ten years ago. Granulating tissue was found in the right frontal sinus during the endoscopic examination performed.


FINDINGS:
The coronal CT scan (bony window) without contrast administration demonstrates a hypodense mass in the ethmoidal cells and frontal sinus. The superior nasal concha on the left side and the walls of the ethmoidal cells are missing due to the previous operation.
Side finding: polypoid swelling of the mucous membrane lining both maxillary sinuses.


DIAGNOSIS:
Relapse of an esthesioneuroblastoma after a previous operation. No evidence of intracranial orbital spread on the right side .


DIFFERENTIAL DIAGNOSIS:
Other malignant or benign tumors in the ethmoidal cells and frontal sinuses.



Suggestions for further reading:

1) Amersham Health
3) AWMF