How to judge false precocious puberty and true precocious puberty at the age of 8

Pseudoprecocious puberty and true precocious puberty in 8-year-old children can be determined through sex hormone stimulation tests, bone age testing, imaging examinations and other methods. Pseudoprecocious puberty is usually caused by exogenous hormone intake or adrenal gland disease, while true precocious puberty is mostly related to early activation of the hypothalamic-pituitary-gonadal axis.

1. Sex hormone stimulation test

Luteinizing hormone and follicle-stimulating hormone levels in the blood are measured after an injection of a gonadotropin-releasing hormone analogue. The hormone levels of children with true precocious puberty increased significantly after stimulation, while those with pseudoprecocious puberty showed no significant change. This examination needs to be conducted under the guidance of a doctor, and parents need to understand the examination process in advance and calm their children's emotions.

2. Bone age detection

An X-ray of the left wrist is taken to assess skeletal maturity. The bone age of children with true precocious puberty often exceeds their actual age by more than 1 year, while the bone age of children with pseudoprecocious puberty is basically consistent with their actual age. Parents need to help their children maintain a fixed posture during the examination to avoid repeated photography.

3. Imaging examination

Pelvic ultrasound can observe the development of the uterus and ovaries, and brain MRI can detect hypothalamic lesions. In girls with true precocious puberty, the ovarian volume is increased and multiple follicles can be seen, while in pseudoprecocious puberty, most of the reproductive organs have no substantial changes. Before the examination, parents should inform their children about the examination process to eliminate fears.

4. Speed ​​of progression of secondary sexual characteristics

The secondary sexual characteristics of true precocious puberty develop progressively, and menarche may occur within 6 to 12 months after breast development. In pseudoprecocious puberty, secondary sexual characteristics progress slowly or stagnate. For example, premature breast development alone may last for several years without change. Parents need to record their children's developmental changes every month and take photos for doctors' reference.

5. Basic sex hormone levels

Test hormones such as luteinizing hormone and estradiol on an empty stomach in the morning. The basal LH level of true precocious puberty often exceeds 0.3IU/L, while that of pseudoprecocious puberty is mostly within the normal range. Avoid strenuous exercise one day before the blood test. Parents can prepare toys to distract children.

If children find symptoms of precocious puberty, they should seek immediate medical attention from a pediatric endocrinology department and avoid using health products or folk remedies on their own. Pay attention to daily weight control, reduce high-sugar and high-fat diet, and ensure adequate sleep. Avoid contact with hormone-containing foods and cosmetics, and regularly monitor changes in height and weight. Children with true precocious puberty may need to be treated with gonadotropin-releasing hormone analogues, while pseudoprecocious puberty usually requires observation and follow-up.