Orbital
cavernous hemangiomas present most commonly in young adults in the
retrobulbar space.These
lesions are well encapsulated, are benign and slowly progressive, and may
cause chorioretinal stria or folds.They
are distinguished by the formation of large cavernous vascular channels or
spaces which are considerably larger than those of capillary hemangiomas
(#22116).Histologically, the
mass is sharply defined and encapsulated.These lesions are made up of large cavernous vascular spaces
separated by a scant connective stroma (#22118).The spaces are lined by a flattened monolayer of endothelial cells
with variable amounts of smooth muscle in the walls.These spaces are filled with red blood cells which may layer out
from the serum due to the slow flow through the lesions (#22119).
