Melanoma metastasis to medial rectus

Case contributed by A.Prof Frank Gaillard

Presentation

History with-held.

Patient Data

Age: Adult
Gender: Male
Modality: MRI

The medial rectus muscle is markedly enlarged by a heterogeneously enhancing mass. The central portion of the mass is necrotic and surrounded buy haemorrhage, but the peripheral portions enhance and extend in a finger-like fashion into the surrounding orbital fat. 

Case Discussion

This patient had known metastatic melanoma and this deposit is consistent with a metastases. In contrast to uveal metastases which are often bilateral (up to 25%), extraocular orbital metastases are usually unilateral (with the exception of neuroblastoma). Only infrequently primarily involve the extraocular muscles as is the case here.. the tumour that most often does this is melanoma. 

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Case Information

rID: 9415
Case created: 15th Apr 2010
Last edited: 2nd Oct 2016
System: Head & Neck
Inclusion in quiz mode: Included

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