K 130Ectopic epibulbar lacrimal glands (choristomas) a case report
A. Nietgen, F. Sistani, C. Erb
Introduction: We report about a 23-year-old female with ectopic lacrimal gland tissue in nasal bulbar conjuctiva and limbal region of her right eye.
Patient and Methods: The patient noticed two conjuctival tumors, which showed a progressive growth during the last two years. She was admitted and a surgical excision of the lesion was performed. This was followed by a hematoxylin and eosin staining and histological examination of the tissue
Results: The histology revealed conjuctiva with bundles of seromucous glandular tissue, which was compatible with ectopic lacrimal glands.
Diskussion: Choristomas are characterized by variable combinations of ectopic tissues like cartilage, lacrimal gland and smooth muscle. Clinically they resemble limbal dermoids or pterygia. If the lacrimal element predominates, they are called ectopic lacrimal glands. Usually they are present at birth, but become apparent in young adult life. In case of multiple choristomas, they are situated at temporal and nasal conjuctiva, limbus and cornea. It is thought, that epibulbar choristomas have their origin in ectopic pluripotent cells. These cellular bundles can result in tissue complexes or one tissue type can predominate. Choristomas are benign tumors
Dept. of Ophthalmology, Hannover Medical School, Carl-Neuberg-Str. 1, D-30625 Hannover, Germany