An obese 12-year-old girl could be taken from the care of her mother after a doctor raised concerns about her health.
Council social services bosses have begun family court litigation and a judge is expected to make decisions in the near future.
Detail of the case has emerged in a ruling by Judge Clifford Bellamy, who analysed preliminary issues at a private family court hearing.
Judge Bellamy, who is based in Leicester, said no-one involved could be identified.
A doctor had examined the girl a few months ago and concluded her body mass index was at a "dangerously high level", said the judge.
The youngster had gone into foster care pending decisions about her long-term future.
Judge Bellamy said medical experts would give evidence relating to concerns about the youngster's obesity before decisions about where she should live were made.
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