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Iris melanoma in an Australian cohort
Lindsay A McGrath1,2, Sunil K Warrier1, William J Glasson1,2
1Terrace Eye Centre, Queensland Ocular Oncology Service, Brisbane, Australia.
Clinical & Experimental Ophthalmology
|July 24, 2024
Summary
This study on iris melanoma in Queensland found that high ultraviolet radiation (UVR) exposure is linked to the condition. Identifying iris freckles and UVR history may help stratify risk for this rare eye cancer.
Area of Science:
- Ophthalmology
- Oncology
- Epidemiology
Background:
- Iris melanoma is a rare intraocular tumor.
- Understanding its clinicopathological features and epidemiology is crucial for patient management.
Purpose of the Study:
- To report the clinicopathological features and epidemiology of iris melanoma in Queensland, Australia.
- To investigate risk factors associated with iris melanoma development.
Main Methods:
- Retrospective study of 86 patients with iris melanoma treated between 2001 and 2022.
- Data collected included demographics, clinical features, histopathology, and survival outcomes.
- Age-adjusted incidence and relative survival rates were calculated.
Main Results:
- The majority of patients (97%) were Caucasian with fair skin and Fitzpatrick Skin Type I or II.
- A history of high ultraviolet radiation (UVR) exposure was noted in the cohort.
- Most tumors (77%) were spindle cell type with low-risk genetic profiles, and only one case of metastasis was documented during a mean follow-up of 8 years.
Conclusions:
- Iris melanoma is associated with iris freckles, history of UVR exposure, and dermatologic findings, supporting UVR's role.
- Occupation, avocation, and iris freckle evaluation may help stratify risk for UVR-related uveal melanoma.
