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Metastatic mammary carcinoma to the orbit masquerading as maxillary sinusitis
Rami Abo-Shasha1, Camilla Stepniak, David H Yeh
1Department of Ophthalmology, Western University, London, Ontario, Canada.
Introduction:
We report on a case of isolated metastatic breast cancer to the medial rectus muscle. This entity is exceedingly rare.
Case:
A 44-year-old female with a history of breast cancer presented with unilateral maxillary symptoms and was treated for sinusitis. Over time, she developed ocular pain, diplopia, blurred vision and eventually complete adduction deficit.
Results:
T1-weighted magnetic resonance imaging revealed a medial rectus lesion. Biopsy via transnasal transorbital endoscopic approach revealed metastatic mammary carcinoma.
Discussion:
Metastatic disease to the orbit should be considered in the differential diagnosis of refractory maxillary sinus pain in patients with a known underlying malignancy.
