Pleomorphic adenoma of the lacrimal gland
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MRI through the orbits demonstrates an extraconal mass in the upper outer quadrant which is of intermediate T1 and T2 signal, and enhances brightly following administration of contrast.
The mass is pushing the globe inferomedially and importantly is distorting the globe (best seen on coronal image) which indicates the mass is firm.
Features are strongly suggestive of a lacrimal gland tumour and pleomorphic adenoma is the most likely entity. Differential includes:
- lacrimal gland tumours
- nerve sheath tumours
- metastases : usually less well defined
- lymphoma : usually softer (do not distort the globe)
- orbital haemangioma : more commonly intraconal
Pleomorphic adenoma of the lacrimal gland was histologically proven on resection.