Intramuscular myxomas are myxoid neoplasms that mainly affect the muscles of the thigh, upper arm, and gluteus. In the head and neck region they are rare, and we know of only two reported cases in the masseter muscle. We think that this is the third. A 60-year-old woman presented with a painless nodule on the right side of her face. Magnetic resonance imaging showed a well-defined mass restricted to the muscle, with no infiltration into adjacent structures. Microscopic analysis confirmed the gross examination, and showed a tumour with copious myxoid stroma, scattered spindle to stellate cells, and an absence of atypia, which did not stain for CD34, S100, or smooth-muscle actin. A final diagnosis of intramuscular myxoma was made. Despite its rarity, it is important to consider this neoplasm in the differential diagnosis of tumours with a gelatinous-like appearance that involve masticatory muscles of the head and neck.
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- Magnetic resonance imaging of intramuscular myxoma with histological comparison and a review of the literature.Skeletal Radiol. 2005; 34: 19-28
- Intramuscular myxoma: clinical and surgical observation notes on eleven cases.Int Orthop. 2017; 41: 837-843
- Intramuscular myxoma of the masseter muscle. A case report.Oral Maxillofac Surg. 2009; 13: 37-40
- Intramuscular myxoma of the masseter.J Oral Maxillofac Surg. 1984; 42: 684-686
- Prevalence and clinical features of Mazabraud syndrome.J Bone Joint Surg Am. 2019; 101: 160-168
- Detection of GNAS mutations in intramuscular/cellular myxomas as diagnostic tool in the classification of myxoid soft tissue tumors.Diagn Pathol. 2018; 13: 52
- GNAS1 mutations occur more commonly than previously thought in intramuscular myxoma.Mod Pathol. 2009; 22: 718-724
Published online: November 21, 2019
Accepted: October 30, 2019
Received: May 16, 2019
© 2019 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.