Beardless armpit and pubic hair

Introduction No whisker hair and pubic hair were found in Klinefelter syndrome. Also known as congenital testicular hypoplasia or Klinefelter syndrome. The typical karyotype is 47,XXY. The phenotype is characterized by testicular hypoplasia. The slender figure is caused by the increase in the distance from the heel to the phalanx. Male mammary gland development, pubic hair is female-type distribution, penis and testicles are small. Severe cases are accompanied by mental retardation, cryptorchidism and hypospadias. Sometimes it can occur in some organic diseases, such as anterior pituitary dysfunction, hypothyroidism, testicular feminization syndrome.

Cause

The causes of a beardless have the following:

1. The development of men's secondary sexual characteristics is not obvious, and the gonadotropin secreted by sex hormones in the body is impaired.

2. The formation of congenital testicular hypoplasia may be due to the egg cell in the process of maturation and division, the sex chromosome does not separate, forming an egg containing two X, if this egg combines with Y sperm to form 47,XXY fertilized eggs. If the spermatogenic cells do not separate during the first maturation and division of XY, the XY sperm is formed, and this sperm can form 47,XXY fertilized eggs in combination with X eggs. It is generally believed that most of the 47,XXY formation eggs are caused by the absence of sex chromosome segregation during mature division.

The growth of the mane grows under the stimulation of the male hormone testosterone. The reasons for no mane are:

1. For some reason, the level of androgen produced by the adrenal cortex is low. At this time, there may be sparse bristles, which will not affect the ovary and ovulation and menstrual cycle, and will not affect sexual life and future fertility.

2. The armpit is not sensitive to or sensitive to androgen. At this time, even if the level of androgen in the body is normal, it will not grow mane, but this does not affect the development of the breast, nor does it affect the ovulation and menstrual cycle of the ovary. Will affect the sexual life and reproductive function after marriage.

3. There is also a non-long hair condition that is ovarian dysplasia or congenital absence of ovary in adolescent women. These people often affect the development of the breast, the menstrual cycle is also affected, and the body is short and the appearance is naive.

an examination

Related inspection

Trace element detection in human body

It is generally difficult to make a diagnosis before the developmental period. Infertility or sexual dysfunction is the main reason for the patient's visit. The two sides of the testicle are small, and the breast hypertrophy on both sides is a typical condition. X small body positive, karyotype is 47, XXY can definitely diagnose.

Differential diagnosis

Loss of pubic hair can sometimes occur in some organic diseases, such as anterior pituitary dysfunction, hypothyroidism, testicular feminization syndrome. However, patients with vaginal hair should be accompanied by other symptoms, such as hypothyroidism, accompanied by hair, eyelashes, eyebrows, hair loss, cold, generalized edema, weight gain, and decreased thyroid hormone levels. Patients with sexual dysfunction also have abnormalities such as spasm, poor sexual organ development, poor breast development, amenorrhea, and low levels of sex hormones. If you are not at ease, you can go to an endocrinology specialist to check for thyroid hormones, gonadal hormones, androgen receptors, estrogen receptors, B-ultrasound, and chromosomes.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.