Pediatric Orbital Myxoma With Ethmoid and Orbital Involvement

Myxomas are benign, connective tissue tumors of mesenchymal origin, often observed in cardiac tissue, but occasionally arising in the head and neck region. Orbital involvement is exceedingly uncommon, particularly in pediatric patients. This case report presents a 5-year-old male with a progressive decline in ophthalmic function, found to have a periorbital myxoma occupying the right posterior ethmoid cavity and extending into the right orbit. Imaging revealed a nonenhancing expansile lesion with bony remodeling and displacement of extraocular muscles. Complete resection was completed through a combined open orbital and endoscopic ethmoid approach. Final pathology confirmed sinonasal myxoma. Postoperative recovery was uneventful, with imaging at 3 months showing no recurrence. The patient will continue to be followed closely in the future.