Unilateral proptosis as the manifestation of euthyroid Graves orbitopathy: A case report.

RATIONALE: To report a case of Euthyroid Graves' disease with Unilateral eye involvement and its diagnostic and management challenges.

PATIENT CONCERNS: A 36-year-old female with left eye proptosis.

DIAGNOSES: CECT and MRI reported the proptosis of the left eye with thickening of the left extraocular muscles without the involvement of the tendons, without a focal lesion, with mild hyperintensity and mild diffuse enhancement representing unilateral thyroid ophthalmopathy.

INTERVENTIONS: CECT and MRI for the diagnosis. IV methylprednisolone for the management.

OUTCOMES: Complete resolution of symptoms by 6 months.

LEARNINGS: 1) Although commonly hyperthyroid, patients with Graves' disease may be euthyroid. 2) Graves' orbitopathy can affect the unilateral eye. 3) Long-term follow-up and joint endocrine and ophthalmology teamwork required for effective management.