Abstract
Iris melanoma is the rarest type of uveal melanomas. Only 4-5% of uveal melanomas occur on the iris. Although the iris can be easily examined due to its location, differentiation of melanocytic malformations such as naevi or melanomas is difficult for the examiner. According to publications by Rones and Zimmermann, histological examinations showed 22% of tumors to be malignant and 78% to be benign. This lead to iridectomy and iridocyclectomy as therapeutic solutions to gain ground over enucleation. Follow-up of the clinical signs, transillumination, ultrasonic biomicroscopy, iris fluorescein angiography and photo-documentation of the clinical signs can be of great help in diagnosis of pigmented iris tumours. Growth of the tumour, secondary glaucoma, hyphaema, significant vascularisation of the tumour and increasing extent of pigmentation can be signs of malignant behaviour.
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