Resumen

CAMPOHERMOSO-RODRIGUEZ, O et al. Variant of the hemiazygos veins: left azygos vein? A case report. Cuad. - Hosp. Clín. [online]. 2018, vol.59, n.Especial, pp. 88-92. ISSN 1652-6776.

ABSTRACT INTRODUCTION: The azygos-hemiazygos venous system is necessary in the drainage of the thorax. These vessels originate in the embryological phase from the supracardinal veins, with a series of tributaries that begin in the thoracic Wall and mediastinum mainly, finding varieties, such as our finding, which must be considered in medical practice. CASE PRESENTATION: In a male corpse dissection we found a venous trunk parallel to the left side of the vertebral column which would result in the joining of the hemiazygos veins; beginning in the confluence of the subcostal vein and ascending lumbar, draining in the brachiocephalic vein on the same side, similar to the azygos vein, without any connection between them. DISCUSSION: There are many varieties reported in diverse studies, which can be categorized in three types. Ours corresponds to type I, with an incidence of 1 %. Such varieties can originate in embryological phase due to the lack of differentiation of supracardinal veins. We can highlight the importance ofsuch varieties in the clinical and surgical fields. CONCLUSION: Our finding is a very particular case, unlike other revised studies, which is why it would be pertinent to further research this topic.

Palabras llave : Hemiazygos, Azygos; system; variant.