case_images: PMC7771408_01
case_images: A 64-year-old male presents with right eye pain and proptosis, being treated for acute sinusitis. Axial (left) and coronal (right) non-contrast computed tomography images demonstrate a hyperattenuating subperiosteal fluid collection along the right orbital roof (arrows), which causes mass effect on the right globe (asterisk). Note the lenticular shape, which does not cross suture margins along the lateral aspects, as well as the smooth interface between the hematoma and orbital fat. Sinus disease is present within the right frontal sinus, bilateral ethmoid air cells, and bilateral sphenoid sinuses. There is a defect within the right lamina papyracea (circled).
case_images: JCIS-10-85-g001.jpg
case_images: PMC7771408_01_JCIS-10-85-g001.jpg
case_images: F1
case_images: Computed tomography (CT) imaging showed a slightly hyperattenuating, well-circumscribed fluid collection confined within the subperiosteal space of the right orbital roof causing significant proptosis and mass effect on the superior rectus muscle and superior aspect of the globe [Figure 1].
case_images: PMC7771408_02
case_images: A 51-year-old female with a history of recurrent sinusitis, presents with left orbital pressure. Axial (left) and coronal (right) post-contrast computed tomography images demonstrate a subperiosteal lentiform shaped fluid collection along the left superomedial orbit (arrows) causing mild inferior displacement of the left globe (asterisk). There is no fat stranding within the adjacent orbital fat. Note sinus disease involving the left frontal sinus and left anterior ethmoid air cells.
case_images: JCIS-10-85-g002.jpg
case_images: PMC7771408_02_JCIS-10-85-g002.jpg
case_images: F2
case_images: CT demonstrated a hyperattenuating subperiosteal fluid collection in the superomedial aspect of the left orbit causing mild inferolateral deviation of the globe, as well as mild proptosis [Figure 2].