Granular cell tumour of the orbit: radiological findings.

Radiological findings in four cases of intraorbital granular cell tumour are presented, and compared with those previously reported. These rare lesions often appear to involve an extraocular muscle, and are seen on CT as an enhancing mass, usually well defined, and frequently lying anteriorly. Plain films are characteristically normal; angiographic findings range from normality to a dense tumour blush.