Retiform Hemangioendothelioma Originating in the Paranasal Sinus: A Case Report
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Retiform hemangioendothelioma (RHE) is an extremely rare low-grade variant of angiosarcoma that mostly involves the dermis or subcutaneous tissue, but which has never been reported in paranasal sinus. A 53-year-old woman with the problems of a palpable lump on the left lower eyelid and anosmia visited to our hospital. An expansile mass was observed in the left frontoethmoid sinus in radiologic images, which was suspected to be attributable to bony erosion of the orbital wall and intracranial expansion. Endoscopic sinus surgery was performed to remove the mass. Histopathologically, tissues were infiltrated by arborizing vessels arranged in a retiform pattern. The immunohistochemistry also showed a positive result for CD31 and a partial positive for Ki-67. Because the recurrence was suspected 4 months after surgery, chemoradiotherapy following second operation was performed. Ultimately, we report a rare case of RHE in the nasal cavity.
Abstract
Retiform hemangioendothelioma (RHE) is an extremely rare low-grade variant of angiosarcoma that mostly involves the dermis or subcutaneous tissue, but which has never been reported in paranasal sinus. A 53-year-old woman with the problems of a palpable lump on the left lower eyelid and anosmia visited to our hospital. An expansile mass was observed in the left frontoethmoid sinus in radiologic images, which was suspected to be attributable to bony erosion of the orbital wall and intracranial expansion. Endoscopic sinus surgery was performed to remove the mass. Histopathologically, tissues were infiltrated by arborizing vessels arranged in a retiform pattern. The immunohistochemistry also showed a positive result for CD31 and a partial positive for Ki-67. Because the recurrence was suspected 4 months after surgery, chemoradiotherapy following second operation was performed. Ultimately, we report a rare case of RHE in the nasal cavity.
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