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KMID : 0360220080490020362
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Journal of the Korean Ophthalmological Society
2008 Volume.49 No. 2 p.362 ~ p.367
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A Case of Imploding Antrum (Silent Sinus) Syndrome after Orbital Decompression
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Jang Seung-Won
Oh Dong-Eun
Kim Yoon-Duck
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Abstract
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Purpose : Imploding antrum (silent sinus) syndrome has clinical features of enophthalmos and hypoglobus
after a downward collapse of inferior orbital wall with an ipsilateral volume decrease of maxillary sinus. We
present a case of imploding antrum syndrome after an orbital decompression surgery.
Case summary : A 26-year-old female underwent inferomedial wall orbital decompression surgery through a
caruncular approach to reduce exophthalmos. At 14 months after surgery, her right eye showed 2 mm of
enophthalmos and orbital CT scan revealed both maxillary sinusitis. At 28 months after surgery, 3 mm of
enophthalmos and hypoglobus of the right were observed, and an orbital CT scan was taken. Orbital CT scan
showed a downward collapse of inferior orbital wall, a volume decrease and inward bowing of the maxillary
sinus, and a maxillary opacification on the right side, which are typical findings of imploding antrum (silent
sinus) syndrome.
Conclusion : Imploding antrum (silent sinus) syndrome after orbital decompression surgery is a rare
complication. Considering that any prolapsed orbital fat after orbital decompression surgery could result in
imploding antrum syndrome with hypoventilation of a maxillary sinus, care should be taken to keep the
maxillo-ethmoidal interface (bony strut) intact, which helps maintain maxillary aeration.
J Korean Ophthalmol Soc 49(2):362-367, 2008
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KEYWORD
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Imploding antrum syndrome, Orbital decompression
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