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Teal died in North Carolina after being diagnosed in April with Stage 4 neuroendocrine pancreatic cancer, his agent Susan Tolar Walters said in a statement to The Times.

The mum-of-two said it was after she passed blood that she was sent for tests that found she had a "low-grade" neuroendocrine tumour in her digestive system.

They then turned the adenocarcinoma tumors into SCLC-type tumors, which generally arise from neuroendocrine cells.

However, its neuroendocrine basis has not been understood.

"We hope this blood test can be used by clinicians to determine if a patient is developing neuroendocrine prostate cancer."