GONADAL‐PITUITARY HORMONE LEVELS IN GYNAECOMASTIA

Plasma levels of LH, FSH, oestradiol 17β and testosterone were measured in twenty‐two men with gynaecomastia. The group was divided by age into those under and those over 50‐years‐old and the mean hormone levels of the two groups were compared with two groups of age‐matched normal men. In the young men with gynaecomastia LH and consequently the LH: FSH ratio was lower than in controls. Older patients with gynaecomastia had higher values of both LH and FSH than normal controls but the LH: FSH ratio was similar in the two groups. A pulsatile pattern of LH was present only in the young controls. Older controls had higher FSH levels than younger controls. In older men with gynaecomastia oestradiol levels and the oestradiol: testosterone ratio were higher than in those without.

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