A doctor misdiagnosed a blood clot that killed a Hoyland teenager, despite knowing she had medical and familial risk factors, an inquest was told.

Dr Karim Mohammed yesterday told coroner Chris Dorries he did not believe Shannon Deakin, 16, of Croft Road, could have had a blood clot because she was a fit young woman, despite being told by her mother, Susan Deakin, that she had been on a contraceptive pill for acne, which can increase the risk of blood clotting.

The court was told Shannon's great aunty also had a history of blood clots.

Shannon had gone to an out-of-hours GP surgery run by Care UK at Barnsley Hospital on December 3, 2011, after complaining of pain in her left thigh, reaching up to her abdomen.

She had a ten minute consultation with Dr Muhammed who told the court he'd ruled out a blood clot due to Shannon's great-aunt not being a close family member and because she'd only been taking a contraceptive for a short time and was no longer on them.

During the examination he didn't find any indications of clotting, such as swelling and hardening of the thigh, which coupled with the lack of major risk factors, made him think it was a skin infection.

He prescribed her with antibiotics, telling her to contact her GP if the symptoms persisted for more than 24 to 48 hours.

Her mother said Shannon rested during the afternoon and went to her aunty's house in the evening after insisting her parents went to a Christmas party because she felt 'much better'.

Susan and husband Bryan arrived home at about 12.50am and Shannon told them she was coming home because her leg was hurting again.

Dad Bryan collected her from her aunty's house but within a few moments of walking through the door Shannon collapsed. She was later declared dead at hospital.

The inquest continues.