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. 2020 Nov;5(6):e000990.
doi: 10.1136/esmoopen-2020-000990.

Uveal melanoma-associated cancers revisited

Ahmad Samir Alfaar  1 , Anas Saad  2 , Shiema Elzouki  3 , Mohamed H Abdel-Rahman  4 , Olaf Strauss  5 , Matus Rehak  6
Affiliations

Uveal melanoma-associated cancers revisited

Ahmad Samir Alfaar et al. ESMO Open. 2020 Nov.

Abstract

Background: Uveal melanoma (UM) is the most common primary ocular malignancy of adults. A small group of patients was found to express familial predisposition. Moreover, it may be preceded or followed by other malignancies elsewhere in the body. We aim to compare the incidence of UM and other associated cancers and study the factors that may influence each condition.

Patients and methods: We have collected the data from the Surveillance, Epidemiology and End Results database of nine US cancer registries for UM patients between 1973 and 2015. We calculated the standardised incidence ratios for single primary UM, first primary and second primary UM, and compared the groups for multiple factors.

Results: A total of 4946 patients were included in the study; 3863 with single primary UM, 646 developed a second primary malignancy following UM, and 437 patients developed second primary UM following a previous primary malignancy. The risk of developing UM increased after leukaemia, melanoma of the skin and prostate. On the other side, the risk of developing melanoma of the skin, thyroid, renal and other eye and orbit malignancies has increased significantly after initial UM. This risk was more evident in the age group between 50 and 70 years old. Cancer-specific survival was significantly higher in UM associated with other malignancies group compared with single primary UM.

Conclusion: Our study showed a different behaviour of the UM when associated with other tumours that exceed the known spectrum of hereditary UM. Further studies are required to dissect the genetic background of this behaviour.

Keywords: eye; hereditary eye cancers; second primary cancers; survival; uveal melanoma.

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Conflict of interest statement

Competing interests: None declared.

Figures

Figure 1
Figure 1
The distribution of the age in years at um diagnosis (A) and latency between UM and the other malignancy in months (B) in the three groups. UM, uveal melanoma.
Figure 2
Figure 2
Overall (A, C) and UM cancer-specific (B, D) survival. UM, uveal melanoma; UVM, uveal tract melanoma.
See this image and copyright information in PMC

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