Abstract: The present invention relates to serum marker microRNAs (miRNAs) which are associated with cancer, particularly melanoma, and to the assessment thereof in the prognosis, treatment and management of cancer. Embodiments include methods, compositions, kits and isolated nucleic acids. The present invention is directed to methods and compositions for prognosing melanoma and monitoring for recurrence by monitoring serum miRNAs, and the use of miRNAs and antagonists thereof, particularly antagomirs, for predicting and assessing risk and/or likelihood of recurrence in a melanoma patient. The present invention relates to biomarkers for melanoma, particularly serum markers and sets thereof which are relevant and significant as prognostic indicators of melanoma disease and patient risk for recurrence.