Abstract
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.
Keywords
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Article info
Publication history
Published online: November 21, 2019
Accepted:
October 30,
2019
Received:
May 16,
2019
Identification
Copyright
© 2019 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.
