pediatrician, neurologist
Hello! Your endocrinologist said everything is true, nothing terrible in an isolated telarche there. The fact is that girls aged 6-24 months or 4-7 years experience a physiological increase in gonadotropic hormones, one of the functions of which is growth and puberty. With an increase in these hormones, there may be an increase in the mammary glands, and the bone age may slightly exceed the chronological (usually not more than 1 year).
Usually this condition passes during the year. You should be examined twice a year and consult an endocrinologist. To control the condition of the child, you need to take a blood test for hormones: FSH, LH, prolactin, estrogens, testosterone, somatotropic hormone.