My seven year old had orbital cellutitis about a month ago following a severe sinus infection. He just had a follow-up CT scan. The report says "a soft tissue nodule in the sphenoid sinus that measures 4 mm probably reflects a postinflammatory retention cyst versus a small polyp." Is this something we need to worry about?
Retention cysts, mucoceles and polyps commonly develop in association with sinus infection/inflammation. They are usually of no consequence and require no treatment, surgical or otherwise, especially when, at 4 mm, they are tiny. For a more definitive opinion, specific to your son's situation, especially with the history of orbital cellulitis you should consult with an ENT specialist. You should probably do that anyway, because of the orbital cellulitis, even if the retention cyst were not present.
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