Published Saturday, 29 March 2014
Wee Oscar with his dad Stephen at a Celtic game at Parkhead. (© Presseye)
Oscar, from Glengormley, captured the hearts of many thousands of people after his family started a social media campaign on Facebook and Twitter to highlight his fight against neuroblastoma, an aggressive childhood cancer, and to raise funds for vital life-saving treatment.
Earlier this week, his family announced he was very ill and getting worse "each day" and had pinned their hopes on a new drug to help Oscar fight the illness.
However, on Friday they said his condition had become worse and they had "moved to a phase of managing his pain".
Since the announcement, thousands of messages of support have been made on Facebook and Twitter.
Deputy First Minister Martin McGuinness offered his prayers to the family.
Also Celtic Football Club, who Oscar was given the honour of leading out on pitch before a Champions League match last summer, offered their support to the "brave Bhoy", with fans giving him a minute's applause on Saturday.
Since November 2011 thousands of people, including many high profile names, have backed the family's campaign raising hundreds of thousands in donations.
The campaign was such a success that the family reached their fundraising goal and were able to send Oscar to America for the treatment he so desperately needed to overcome his illness.
In April last year, the family celebrated with the news there was no sign of the cancer and doctors had given Oscar the all clear, however, later in August they revealed it had returned.
Oscar's inspirational story led to him winning the overall prize at the Spirit of Northern Ireland awards last year, which was presented to him by his friend, two-time Olympic bronze winning boxer Paddy Barnes who also joined with the well-wishers on Twitter.
© UTV News