Diffuse sphenoid bone cavernous hemangioma presenting during pregnancy.

We present a case of diffuse sphenoid bone cavernous hemangioma in a 22-year-old primigravid woman. Her disease first manifested clinically as progressively decreasing vision in her left eye during her third trimester of pregnancy. We also discuss the known causes and some theoretical causes of cavernous hemangioma enlargement during pregnancy.