A 55-year-old woman has a slowly enlarging firm mass arising in the superotemporal quadrant of the left orbit, consistent with a pleomorphic adenoma of the lacrimal gland. The expected direction of globe displacement is:
- A Inferiorly and nasally ✓
- B Straight forwards along the anteroposterior axis
- C Superiorly and temporally
- D Backwards with enophthalmos
Correct answer: A. Inferiorly and nasally
Explanation
An extraconal mass pushes the globe away from itself, producing non-axial displacement. B lesion in the superotemporal quadrant, such as a lacrimal gland tumour, therefore displaces the eye downwards and inwards. Axial forward displacement indicates an intraconal lesion such as an optic nerve glioma or cavernous haemangioma. Enophthalmos suggests volume loss, scarring, or a varix rather than a solid tumour.
Reference: Parsons' Diseases of the Eye, 23rd ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.