..Starting node ..Lymphangioma of the orbit (HP:0500091)
Term ID:
500091
Name:
Lymphangioma of the orbit
Synonym:
Definition:
A hamartoma of lymph vessels that usually presents in childhood. It tends to increase in size with head-down posture and with the Valsalva manoeuvre. Superficial lesions are visible as transilluminable cystic spaces of the lid or conjunctiva that may also contain blood. Deep lesions may cause gradual proptosis or present acutely with orbital pain and reduced vision due to haemorrhage.