SINGAPORE- The medical report concerning the mental capacity of wealthy widow Madam Chung Khin Chun has been submitted to the court.

The Family Court had earlier ordered the Office of the Public Guardian (OPG) to appoint a medical expert to review Madam Chung's mental state to assess if she is capable of revoking the Lasting Power of Attorney (LPA) vested on former China tour guide Yang Yin.

Her niece Madam Hedy Mok has alleged that Yang, 40, had manipulated the 87-year-old widow into granting him the LPA which gives him control over her welfare and assets worth $40 million.

The hearing to decide if Madam Chung has the mental capacity to revoke the LPA will take place on Friday at the Family Court.

Speaking to The Straits Times after a pre-trial conference on Wednesday, Madam Mok's lawyer Andrew Lee and Mr Yang's lawyer Daniel Zhu confirmed that the medical report had been submitted to the court on Monday.

In September, the OPG had asked the court to decide if Madam Chung has the capacity to revoke the LPA she had given to former China tour guide Yang Yin, who moved into her Gerald Crescent bungalow in 2009.

This was after the widow, who was diagnosed with dementia this year, had applied directly to the OPG to revoke the LPA she gave to Mr Yang.

"All parties have received the medical report and will be reviewing it," said Mr Zhu.

This is the latest development to take place between Mr Yang and 60-year-old Madam Mok, over the widow's assets.

Apart from ongoing civil suits, Mr Yang faces 331 charges against him for falsification of accounts.