Conjunctival Inclusion Cyst Containing a Scleral Buckle

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A 75-year-old man presented with a week’s history of a painless grayish mass in left superonasal conjunctiva 2 years after scleral buckling (Fig. A). There was no other history of surgery or trauma. CT demonstrated hyperdense rod-like structure (arrow) within cystic lesion (Fig. B). Axial T2-weighted (Fig. C) and coronal T1-weighted MRI (Fig. D) demonstrated a well-circumscribed high signal intensity lesion with internal rectangular low signal intensity. At surgery, a silicone sponge (inset) was floating freely inside the cyst (arrow) which extended posteriorly from the insertion of the superior and medial recti (Fig. E). There was no other buckling material in the eye. The cyst was completely resected and histopathologic exam revealed a squamous epithelium-lined inclusion cyst (hematoxylin and eosin, ×40; Fig. F).
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