Infantile haemangioma of the orbit
Periorbital soft painless vascular lesion.
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MRI shows periorbital hyperintense T2 mass with multiple flow voids and homogenous enhancement post Gadolinium. The lesion is mostly pre-septal, but is has a post-septal, extra-conal component at the superior portion of the orbit. The ipsilateral orbit is deviated inferiorly, but otherwise normal.
Brain parenchyma is normal. There are no other vascular anomaly on this MRI. Hence, it is compatible with infantile haemangioma of the orbit.
The principal differential diagnosis in this case would be rhabdomyosarcoma, since other arteriovenous malformations would be highly unlikely, but a more heterogenous enhancement would be expected. Also, the age of the patient and location of the lesion makes this diagnosis a lot less plausible.