Epithelial interface cysts after epikeratophakia.
BACKGROUND
Epithelial interface cysts have been occasionally observed after lamellar keratoplasty. The authors report the incidence, clinical significance, and management of this complication in epikeratophakia patients.


METHODS
From August 1987 to January 1991, 108 consecutive patients undergoing epikeratophakia entered a prospective study aimed at evaluating both clinical results and changes in corneal physiologic parameters. After an average hospitalization of 6 days, all patients underwent complete ophthalmologic examinations at regular intervals after surgery. All postoperative complications, including the development of epithelial interface cysts, were recorded and photographed.


RESULTS
Over a 3-year period, epithelial interface cysts were observed in 8 eyes, with an overall incidence of 7.4%. All cysts originated under the periphery of the epilens. In five patients, the cysts enlarged centripetally but eventually ceased to grow, causing no visual impairment. In two patients, after an initial increase in size the cysts slowly regressed and finally disappeared. In only one patient, a cyst migrated over the visual axis, thus necessitating surgical removal. The cyst did not recur during an observation time of 18 months after debridement, allowing full recovery of visual acuity.


CONCLUSIONS
The incidence of epithelial interface cysts after epikeratophakia is relatively high. Because of their peripheral location and self-limited growth, the clinical significance of this complication is low. The possibility of spontaneous regression of the cysts supports a conservative approach, as long as the visual axis is not affected. Surgical removal is possible without compromising the epi-lens and is compatible with an excellent visual outcome.
Busin
M
M
University Eye Hospital, Bonn, Germany.
Cusumano
A
A
Spitznas
M
M
D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003316:Corneal Diseases / Q000209:etiology* / Q000473:pathology; D003560:Cysts / Q000209:etiology* / Q000648:ultrastructure; D004728:Endothelium, Corneal / Q000473:pathology* / Q000648:ultrastructure; D017391:Epikeratophakia / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007905:Lens Diseases / Q000209:etiology* / Q000473:pathology; D007908:Lens, Crystalline / Q000648:ultrastructure; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D011446:Prospective Studies