Recurrent inverted papilloma of paranasal sinus presenting as acute proptosis.

Objective. To describe the course of events that followed from the time of the diagnosis to the management of a rare case of recurrent inverted papilloma presenting as an acute proptosis. Methods. A seventy-year-old diabetic female patient presented with a painful left eye proptosis for 15 days. She had a history of resection of inverted papilloma of paranasal sinus followed by radiotherapy for eight years before. The examination revealed a 23 mm proptosis, with restricted ocular movements, corneal oedema, funnel shaped anterior chamber, and total retinal detachment with a complete visual loss. The lobulated fixed hard mass was palpable circumferentially but more in the inferior orbital compartment. The transconjunctival incisional biopsy showed features of highly undifferentiated cytology. The lid sparing exenteration was done under general anesthesia with cosmetic reconstruction. Results. Immunohistochemistry of exenterated mass was doubtfully suggestive of a small cell tumor. However, histopathology confirmed features of rhabdomyosarcoma. Conclusion. The present case study revealed rhabdomyosarcoma cytology presenting as an association-inverted papilloma. Abbreviations : IP = Inverted papilloma, PNS = Paranasal sinus, SCC = Squamous cell carcinoma, IOP = Intraocular pressure, CT = Computed tomography.