PMC7178486_01
CT of the maxillofacial region and sinuses with contrast showing a 17.8 mm x 53.52 mm mass over the left temporalis muscle.
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CT of the maxillofacial region and sinuses with contrast showed an indeterminate process centered over the left temporalis muscle with considerations including vascular or lymphatic malformation, myositis, or injury (Fig. 1).
(A) CT of the head with contrast showing enhancing soft tissue masses in the left frontal scalp, left masticator space, and left parotid space. (B) MRI of the face and sinuses showing an infiltrative lesion in the left temporalis region with extension along the lateral aspect of the left orbit and inferiorly into the infratemporal fossa.
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Infection was considered unlikely due to the stability in size compared to the previous admission's imaging (Fig. 2).
(A) Frontal and (B) horizontal views of the CT of the maxillofacial region with contrast showing the infiltrative lesion in the left temporalis muscle extending into the infratemporal fossa with underlying bony hyperostosis.
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Differential considerations again included cranial fasciitis versus a neoplastic process (Fig. 3).