Sector B-scan ultrasonographic 'hemangiomalike' pattern.

Eleven patients with unilateral exophthalmos had sector B-scan ultrasonography. The ultrasonograms were all similar and demonstrated a "hemangiomalike" pattern consisting in a rounded, well-outlined orbital mass with a sharp anterior border, moderate to strong tissue reflectivity, and fair to good sound transmission. Although the postoperative pathologic findings in six cases confirmed the presence of cavernous hemangioma of the orbit, other lesions, such as hemangiopericytoma, lymphangioma, orbital varix, meningioma, and mixed cell tumor, were found to show a similar ultrasonographic pattern.