(CNN) -- Myanmar's Supreme Court in Yangon announced it will decide within a month on pro-democracy leader and Nobel Peace Laureate Aung San Suu Kyi's appeal of her extended house arrest, her lawyer told CNN.
Such a decision will determine whether the court will proceed with the case.
The military junta has kept her under house arrest for about 14 of the past 20 years. She was sentenced in August to 18 more months of home confinement after being found guilty of violating the terms of her house arrest.
The sentence stemmed from an incident in May when American John Yettaw sneaked uninvited into her house, prompting her to be tried on charges of government subversion.
Suu Kyi, 64, had told the court she didn't know Yettaw, was unaware of his plans to visit and didn't report his intrusion because she didn't want him to get into trouble.
U.S. Senator Jim Webb secured Yettaw's release after he was sentenced to seven years of hard labor.
Suu Kyi's two sole companions also were sentenced to 18 months of house arrest, to be served with Suu Kyi.