The family of British surgeon Abbas Khan have employed an independent pathologist to oversee the post mortem on his body following his death in a Damascus prison.
Nabeen Sheik, a lawyer for the family said the results of the post mortem were expected tomorrow.
The body of Dr Khan was returned to the UK today.
David Cameron has written to the mother of a British doctor who died in custody in Syria, describing his death as "a sickening tragedy".
The mother of British doctor Abbas Khan, who died after 13 months in a Syrian prison, has accused the regime of "murdering" her son.
Relatives of British surgeon Dr Abbas Khan have said they do not understand what led to his death just days before he was due to be released