Characterizations of uveal melanoma patients with three additional primary malignancies.

Purpose: In a population‐based cohort of 960 uveal melanoma (UM) patients, we describe patients with three additional malignancies, including one unique patient with four synchronous primary malignancies. Method: A descriptive presentation of the clinical course and outcome for UM patients with three additional primary malignancies. Results: After more than 20 years of follow‐up of the UM cohort, 11 patients (1.1%) were diagnosed with three additional primary malignancies before, simultaneously or after UM. Among these, one patient had four synchronous primary malignancies, detected during workup for a symptomatic UM. All diagnoses were treated during the following 4 months, firstly the breast cancer, thereafter, the lung and pancreatic cancers and finally the UM. The patient died 3 years later of abdominal carcinomatosis due to the pancreatic cancer. The family history and gene testing did not disclose any genetic predisposition for cancer. A comparison of the four synchronous tumours, morphologically and immunohistochemically, showed no similarities and the expression of antibodies was different. Conclusion: Patients with UM may be diagnosed with non‐ocular additional primary cancers. Thus, a comprehensive workup is obligatory and a further follow‐up of the UM patients seems necessary. The UM is not always the main problem. [ABSTRACT FROM AUTHOR]