Abstract
Over the last ten years, much has been learnt about the genetic characteristics and
genetic evolution of uveal melanoma. It has been shown that uveal melanoma differs
fundamentally from non-uveal melanoma and is an independent genetic subtype. Compared
to other tumours, uveal melanoma has a low mutational burden. There are recurring
chromosomal aberrations with losses of 1p, 6q, 8p and 16q, gains of 6p and 8q, and
the presence of monosomy 3. GNAQ, GNA11, PLCB4, CYSLTR2, MAPKAPK5, as well as mutations in BAP1, SF3B1, SRSF2 and EIF1AX, the latter being linked to a higher risk of metastasis, have been identified as
significantly mutated genes. In rare cases, a BAP1 germline mutation may also be present. In addition to higher risk of uveal melanoma,
this variant is also linked with other tumours. In this case, additional work-up,
genetic counselling and screening of family members should be offered. While
the knowledge about the genetic characteristics of uveal melanoma is already
routinely used for diagnostic and prognostic purposes, targeted genotype-dependent
therapy of uveal melanoma is currently still missing.
Key words
genetics - uveal melanoma - chromosomal aberration - somatic mutation - genetic evolution
- BAP1 tumour predisposition syndrome