Opening of the middle thyroid vein into the vertebral vein in the fetus

: In the material of 29 human fetuses, of both sexes, without developmental anomalies, we investigated by corrosion technique outflow of blood from the thyroid gland. On the basis of this study, we noticed in one case the rare variation of immediately of the orifice of the middle thyroid vein to the vertebral vein. This observation may be applicable of evaluation of phlebograms of thyroid gland and surgery of this organ.