Compensated hypothyroidism presenting with galactorrhoea

. Compensated hypothyroidism was diagnosed in a 36‐year‐old female who presented with breast tenderness and mild galactorrhoea. T 4 was 5.8mcg dl −1 and T3RU was 22.5%, while TSH and prolactin were very mildly elevated (6.5mU ml −1 and 26.1 ng ml −1 , respectively). The TRH test showed an exaggerated response. TSH increased to 43 mU ml −1 , and prolactin levels reached 161 ng ml −1 . Treatment with T 4 decreased the TSH and prolactin levels to within the normal range, and prevented the galactorrhoea. The case presented here demonstrates that galactorrhoea can be present even with mild hypothyroidism.