PMC7078461_01
Marked enlargement of the frontal sinuses, more pronounced on the left side with associated dehiscence of the posterior wall of the sinus.
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MRI of the brain and sinuses (Figs. 4-6) showed significant expansion of both frontal sinuses by the mucopyoceles with largest on the left measuring 4.7 x 6.5 x 6.7 cm with avid heterogeneous enhancement. The mucopyoceles were displacing and compressing the underlying dura with significant mass effect (Figs. 4 and 5).
MRI of the brain and sinuses showed significant expansion of both frontal sinuses by the mucopyoceles.
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