WikiLeaks founder Julian Assange’s health is suffering, one of his lawyers says, in conditions she compared to “solitary confinement” in the Ecuadorian Embassy in London.

“I’m very concerned for his well-being and the permanent damage that this is having on his health,” Assange lawyer Jennifer Robinson told ABC News on Friday, adding that her client’s legal team is trying to get him a medical assessment in the next few days.

“He’s been effectively in solitary confinement for at least the last four months, and something akin to confinement of that nature for almost six years, and it is well-documented the impact it has on detainees’ health care,” Robinson added.

Even though she expressed fears about Assange’s living conditions in the embassy, Robinson also said she’s concerned about her client losing his protection from Ecuador, and possible extradition to the United States.