Orbital metastasis from a carcinoid tumor. Computed tomography, magnetic resonance imaging, and electron microscopic findings
C. L. Shields, J. A. Shields, R. C. Eagle Jr, R. G. Peyster, B. E. Conner and H. A. Green
An otherwise asymptomatic 63-year-old woman with a history of a carcinoid
tumor of the ileum and a cutaneous melanoma of the shoulder developed
unilateral proptosis. Orbital ultrasonography, computed tomography, and
magnetic resonance imaging revealed a large, well-circumscribed orbital
mass involving the superior rectus muscle. The surgically excised tumor was
studied by light microscopy, histochemistry, and transmission electron
microscopy. These studies confirmed the diagnosis of carcinoid tumor. The
clinical and pathologic features of this rare type of orbital metastasis
are discussed.
