- Mark Pilgrim revealed on social media that his "immune system has crashed".
- The radio presenter is undergoing treatment for stage 4 lung cancer.
- Despite the setback, Pilgrim continues to fight and thanked his doctors and family for their continued support.
Despite receiving bad news, Mark Pilgrim continues to "choose to see the sunshine every day".
The South African radio personality is battling stage 4 lung cancer and has undergone 9 rounds of chemotherapy as part of his treatment.
This week, however, Pilgrim has been "man-down" and revealed on Thursday that he had received some bad news.
The 53-year-old, who celebrated his birthday on Tuesday, shared that a planned trip for him and his family had to be cancelled as a result.
"The bush holiday to celebrate my birthday was planned a while ago, and this morning, just 10 minutes before leaving with the girls and Adrienne, the doctor called with bad news saying we shouldn't go."
Despite the setback, Pilgrim continues to fight and thanked his doctors and family for their continued support.
"Good news is my doctors have been amazing today, we avoided hospitalisation, and my white blood count should increase in the coming week or so," he wrote.
"Thank you for the continued well wishes."
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Pilgrim was diagnosed with stage 4 lung cancer in March, which he revealed in June had spread to his femur, the base of his spine and lymph nodes.
Earlier this month, he announced that after a 45-minute radiation therapy session, "the tumours in the leg and spine are hopefully gone."