[A variety of orbital lymphangioma treatments: one case treated with orbital decompression therapy and the other case with intralesional injection of OK-432 therapy].

Background: Orbital lymphangioma can result in ocular emergencies due to acute enlargement, leading to painful proptosis, compressive optic neuropathy, exposure keratopathy, restrictive ocular motility and increased intraocular pressure. Treatment methods and clinical courses of two cases with orbital lymphangioma are reported, one with orbital decompression therapy and the other with intralesional injection of OK-432 therapy. CASE 1: An 8-year-old girl had multilocular cystic orbital intracornal lymphangioma. Emergency operation was deemed necessary because the patient presented with the painful proptosis, the compressive optic neuropathy, and increased intraocular pressure due to acute enlargement, we put the orbital inferior wall was decompressed by inserting an intact inframedial orbital strut. The proptosis vanished completely and visual acuity loss improved. CASE 2: A 2-year-old girl had multilocular cystic orbital intra and extracornal lymphangioma. She had severe proptosis and exposure keratopathy. The extracornal cystic lesion was treated with an intralesional injection of OK-432. On the 7th day after injection, the patient presented with painful severe proptosis. Aspiration of the fluid in the cystic lesion was performed, and the drain was preserved. After the treatment, both the severe proptosis and the exposure keratopathy improved.

Conclusions: Inferior wall decompression was performed on case 1 while keeping the inframedial orbital strut. Although the eye movement disorder was low at the time, the medial and lateral wall decompression improved. In case 2, the extracornal cystic lesion was treated with an intralesional injection of OK-432 Judging from the results of that clinical course, the injection of OK-432 to the intracornal lesion could prove dangerous to the visual performance. Although OK-432 is predictably-effective against lymphangioma, it should not perform be applied without careful consideration.