Local recurrence of uveal melanoma and concomitant brain metastases associated with an activating telomerase promoter mutation seven years after secondary enucleation.

Purpose: To describe a case of local recurrence of uveal melanoma with concomitant brain metastases after secondary enucleation. Observations: A 73 year-old patient presented with dizziness and gait instability. MRI of the orbits and brain showed an anophthalmic socket with an orbital implant and an associated optic nerve mass as well as multiple mass lesions in the brain. The patient's history was significant for secondary enucleation for uveal melanoma recurrence seven years prior to presentation. Histopathology of the enucleated eye revealed no signs of extrascleral extension or optic nerve invasion. Biopsy of the optic nerve mass confirmed recurrent uveal melanoma with somatic mutations in GNAQ (Q209L) and the telomerase (TERT) promoter (c.1-124C > T) found on targeted next-generation sequencing (NGS). The same mutations were found in the primary tumor in the patient's archived enucleation samples. Conclusions: Local recurrence of uveal melanoma can occur after enucleation and is associated with an increased risk of systemic metastases. It is important for clinicians to monitor patients for local recurrence and systemic metastases even after enucleation. Genetic biomarkers may play an important role in identifying tumors at highest risk of local recurrence and metastasis. To our knowledge, this is the first case study to describe the TERT promoter mutation c.1-124C > T in the setting of recurrent uveal melanoma.