Maxillary Sinus Nonodontogenic Myxoma Extending into the Sphenoid Sinus and Pterygopalatine Fossa: Case Report

Abstract

Myxomas are benign mesenchymal tumors of uncertain etiology. Th ey can arise from odontogenic tissue, as well as from the sinonasal tract and from the facial and temporal bones, apparently from nonodontogenic mesenchyme. Although histologically benign, myxomas are locally invasive. Histopathology demonstrates a characteristically hypocellular lesion with loose stellate cells. We describe the case of a 48-year-old woman with a nonodontogenic maxillary sinus myxoma that invaded the sphenoid sinus and pterygopalatine fossa. We removed the mass via a combined endoscopic and gingivobuccal approach. Th e rarity of a nonodontogenic sinonasal myxoma extending into the sphenoid sinus and pterygopalatine fossa is the basis for our presentation of this case.

Clival intraosseous myxoma treated with an endoscopic endonasal approach: illustrative case

“…Additionally, articles were filtered for the English language with full-text availability, which revealed 22 articles total (Table 1). 4,8,9,11,[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Of these, two articles reported intraosseous myxomas arising in the clival region, in a total of five patients. 8,9 Our case report is one of the few reports of this pathology treated with an endoscopic endonasal operative approach.…”

Paranasal Mass in a Healthy Male Toddler

“…Those cells are contained in an amorphous, avascular, and myxoid stroma that consists of hyaluronic acid and chondroitin sulfate. 5,7 Myxomas may resemble other tumor types, including rhabdomyosarcomas, which can be differentiated with histochemical stains. 7 The differential diagnosis for a tumor presenting in the maxillofacial region is broad due to the number of structures and their various germ-cell origins.…”

“…Those cells are contained in an amorphous, avascular, and myxoid stroma that consists of hyaluronic acid and chondroitin sulfate. 5,7 Myxomas may resemble other tumor types, including rhabdomyosarcomas, which can be differentiated with histochemical stains. 7…”

“…5,7 Myxomas may resemble other tumor types, including rhabdomyosarcomas, which can be differentiated with histochemical stains. 7…”

“…Because of the unique location of these tumors, they are often classified as either odontogenic (ie, tissues that give rise to teeth) or osteogenic, also called non-odontogenic. 7…”