What is lymphangioma?

• Mostly in children. • Location usually tends to be subcapsular. • Capillary, cavernous, and cystic • Variably sized cysts filled with proteinaceous fluid and lined by flattened endothelial cells. • Cystic spaces are lined by attenuated endothelium resembling that seen in normal lymphatics. • The cysts are separated by a delicate vascular stroma. • IHC: CD31 +