case_images: PMC4943765_01
case_images: Patient at presentation following recurrence of epiphora 1 year after right external dacryocystorhinostomy.
case_images: cop-0007-0274-g01.jpg
case_images: PMC4943765_01_cop-0007-0274-g01.jpg
case_images: F1
case_images: A right medial canthal lump extending above the tendon was noted with the absence of cellulitis (fig. 1).
case_images: MRI with T1 (a) and T2 (b) weighting showing the presence of lacrimal sac mass at the time of presentation. The cavernous sinus is disease free.
case_images: cop-0007-0274-g02.jpg
case_images: PMC4943765_01_cop-0007-0274-g02.jpg
case_images: F2
case_images: Magnetic resonance imaging (MRI) of the orbit and paranasal sinuses showed an area of marked scarring in the site of the previous osteotomy (fig. 2).
case_images: T2-weighted MRI (a, b) showing the presence of a mass surrounding the internal carotid artery in the cavernous sinus 6 months following extensive cancer-clearing surgery. The lesion is marked with arrow heads and enhanced with contrast and T1 imaging (c).
case_images: cop-0007-0274-g03.jpg
case_images: PMC4943765_01_cop-0007-0274-g03.jpg
case_images: F3
case_images: Repeat magnetic resonance neuroimaging demonstrated a gadolinium-enhancing infiltrate in the right cavernous sinus surrounding and compressing the carotid artery (fig. 3).